Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae38ee0d780d696…

MALICIOUS

PDF

91.4 KB Created: 2021-08-04 11:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8f71b7f9d036929118e29f3455fc0175 SHA-1: 5a33eb58977b7a266d8e964d47d856685141a289 SHA-256: fae38ee0d780d69638597e43d63b9370fc383a92b8a55a74e6c2c1557a7c712a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://tortsurprise.ru/upload/redactor/files/9097008092.pdf In PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/942097cfd754d1bf4d385d7383fca21b/65917075740.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/i2agdc1biso96h6muj5jrc99v0/zugiximutuwodukideje.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/doliwuvidimozibijefazoj.pdfIn PDF document text
    • http://techbis.pl/files/file/83931314908.pdfIn PDF document text
    • https://mmszke.hu/files/file/xosezesadowa.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb74a8cc27---mozorosamakefukizoso.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/66550387312.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vsrr5pjvht2c6kpaig8e2v58g5/3371542908.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zatenaveragadebe.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/57682215949.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/90313536924.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f49cd98f2f63fb7d6ba21498b7b426f7/32653103258.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607112f9e3015---baximelomudurivebe.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16097efa8bbd48---10103265867.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/50701534165.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16077794247dc5---5728057142.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/8d053b7028dc786a1c04b7643f2e961f/xikivawi.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c69222826---rovoxuzajiwafukaba.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/mimagatewajojaxireki.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/43678066238.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/61534179824.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/koguxosedogututemavezawa.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3443e67e17---7573625126.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/45618989275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=geometry+dash+mod+apk+unlimited+allPDF 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_off0000ff65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF65 18004 bytes
SHA-256: 8429db5f08ec8befed52069d73a63ef2158fb7169917656b3dd74cf2d8671b29
font_01_sfnt_off00012d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001455a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455A 11000 bytes
SHA-256: 32243437358c08392dc4501237aba9d5b171e832da775bfb31282fa8b592920f