Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e9a93647291005…

MALICIOUS

PDF

138.0 KB Created: 2021-07-19 07:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3bab8600521d475b73084d3c1e410e6 SHA-1: f936b5ec708d78f98f1b3b0917ab0a2666dc8f65 SHA-256: 44e9a936472910059ee59bfa6e91bd4eea658f4495e85826548880593c77c450
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's primary purpose is to trick users into divulging sensitive recovery secrets or private keys. The presence of numerous links to compromised WordPress upload storage and disposable hosting suggests a link farm designed to obscure the ultimate destination or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9187

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43eea15680---67546250830.pdf In PDF document text
    • http://cartopack.com/Images/file/vojozurufadux.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ee9909fd6---xepipefalelopenudu.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/0bc7f0626a89e2aa58aa3c76106400d7/gopuwijemovamozaxogefebiw.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/folofogifatidulasafi.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/53231505337.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/98985427376.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeadec3dc42---ropubasu.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/88096475781.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1s7j4e30ol9airdeqs8geq0985/rivax.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/finuzuvufug.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889d76b010c---kamepujetipipenigevazo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba700a76841---zoteje.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ffbae815c219278adeb8081c5506588f/jutobanetanewitiluxuw.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/2151703505.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608156c1c1169---75971983314.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/5388084538.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079003b479ad---99702421285.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f22d8c806---vojumepa.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/c6mil871n29d1ve7q0r3qeq1c5/seleselujazasefilul.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/f5621783c389428d6993f02bd804dc02/13624817359.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/637f0619012a93f82376e46bc5727a46/19837070913.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608da2ef84be3---genixulibaz.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/c56b2b96c1872d84fa88ac19a4362541/lesezago.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/31d17698f841953de704f1ba6fe6b648/regizolarilutevut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=very+familiar+withPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017af3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17AF3 30812 bytes
SHA-256: 38f48a374a4ae202c29f614ab71690807a07c8baca66965349af620c100c5be4
font_00_sfnt_off000147ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FFA 8012 bytes
SHA-256: a4123c0b5e99d2ef9f742c7415abac9402e2d60fb34f79bd8cb48e43a80877c3
font_03_sfnt_off0001b4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4F2 10256 bytes
SHA-256: 626483a2ffcab7c320fd5bacfbe919dce5adc5108fd696620c22583fe2d0b8e0
font_04_sfnt_off0001cc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC00 33732 bytes
SHA-256: 45c39c5e957cd9bd94e861dcb0fba36d34d85c753007c8fce91e415cbd519b76

Open this report in the interactive analyzer, or submit your own file for analysis.