Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc2d01031d1f118…

MALICIOUS

PDF

76.4 KB Created: 2021-09-01 17:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a3f15cfa41236c75a97ba4d7da663b9 SHA-1: 8cec88880c2da853dc729e008cb564b6867f514e SHA-256: ecc2d01031d1f11836e10a8ba0e810924d16537ec73dc3b9ba5eb62938e25239
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://pistant.ru/uplcv?utm_term=rocking+chair+song+country PDF link annotation
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/vlvd48480luelbi9rpfsvf54l5/55798921732.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/nasedegemot.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c43bf7902dc---57288707032.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/13844198949.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/2c11e92c4ed674e9982403a2c1738cad/53736165162.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/55221022826.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/60649131367.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5aaebd93de---vudalusamezixolivarisavix.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/9b75526c45e126e711cb2ac00faf6ae2/83483248993.pdfIn PDF document text
    • http://www.bash.cl/media/file/xetatuzamoxilil.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/37490092251.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jafigenu.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/wekosa.pdfIn PDF document text
    • http://greenbrier101.com/userimages/lozetapazopiwuv.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/komunive.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/7q5ocfkoaemehr9t40cr9nfb83/xuxekovajefimudaver.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021052323590170554.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/67v066o9fp921ob1hs3r43mdgh/37347916924.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/fbd62605cc2dc329f77a64757c9c5283/genodiwarawekavorib.pdfIn PDF document text
    • http://suachuathietbi.com/upload/files/81243842170.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c685eec8bb8---30574707228.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/5862760827.pdfIn PDF document text
    • http://giga.sk/storage/file/misitipuwubaginubigo.pdfIn PDF document text
    • http://sushi-belovo.ru/files/41459499978.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160831a6f69842---41344188767.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608528719137e---tesesoloxomam.pdfIn PDF document text
    • 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_off0000c74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74A 10684 bytes
SHA-256: d88fdf6fab5fbc89a60d7eb68e722ed2c2bb9df8d951996db6ff580f610063df
font_01_sfnt_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 17476 bytes
SHA-256: 00396169827b2a79af85daabc1aa36abb4d066f9dea2a44d29b30ad1eb59ab64
font_02_sfnt_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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