Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe86b326d68828de…

MALICIOUS

PDF

81.0 KB Created: 2021-07-21 08:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e8442994e72b061f934da6d8a84a1f6b SHA-1: 0f8499af7f14b1a605565cc84acb97049e5e29f9 SHA-256: fe86b326d68828def36a0aca1a7b74165e327789467cbfa85199c2ece4c5b74d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Several heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the detection names imply malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dmhfamilyreunion.com/clients/4/44/44eff64e497b984d8b2945277059c9c0/File/63684098676.pdf In PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b47a84704---4316184226.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/c473d24a7627cd875433b901e5b40a3d/jafudit.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/49bk49vfhihijbfi02uqr7337n/vonamelemoxabevovupake.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3ppk33hnl2f8nc6q502dqakq82/xazesusadibuworofozixabi.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/esilpiv9ogcbde65ikimnd97ko/numoviwik.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070317a39bb5---49753548807.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f0680e09248f233e68e26e274c31fdfc/nokijupomabizikosi.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/9244ea740d100a33bb82b6d1b901043a/powojarekafujatamonetaz.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608435a9e90e3---bukudaligawoselixe.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/tapaxidijode.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/2102294766fb73e2853e6e78dbbaed6a/kuveni.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/76265e1371074d849e250db093b5096a/moluputijabapis.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/400d2fe345b4483f850004f1631f01de/jevetuxisupozuweluru.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/86625991154.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/wefutelamufijitare.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/80701870624.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/kejage.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/rivosekidonomiwa.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/13470702527.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/26119975497.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/80f92b2f282cb6f0eeb6a820ce832fae/84340316487.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/16140735642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=save+pdf+after+rotatingPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 17300 bytes
SHA-256: f8be6d442817e3d754c50a8ee59223c751770e18776fa5c1b75d4cbabd6188c4
font_01_sfnt_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 10600 bytes
SHA-256: 94f86320eb6c7839d80f473159783c6627bae0d802416646e30bb7909e3cdfea

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