Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e93e645136deee…

MALICIOUS

PDF

94.3 KB Created: 2021-08-07 21:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 064165942d41947393eefdec83233202 SHA-1: 8a2ef07f61bb22c869c210fdfc89c2032db969c1 SHA-256: c7e93e645136deee613b917011ec58480e0dd4b2f41a7a7dadef6d7929966116
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4c772c15554550706e175a1990e379f2/43191950968.pdf In PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/l1qv01pvraehhkhc2bj5pi42r6/meluvapopewowinari.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/jawinarolepeziv.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/79110942601.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/gelirimodeke.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3f5e0f8cf---molotepodasokobuduvujul.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/9vdbts9jql9dmriol2glkeq6k2/64195227592.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/80623594582.pdfIn PDF document text
    • http://ruresept.ru/files/file/kudolokabolun.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/xotudaku.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/78421011048.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/31524611470.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/17190893329.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c9bbecae46a1c9cf622af4fb8588e9cd/42079190071.pdfIn PDF document text
    • http://baovethanglongmb.com/upload/files/31966573372.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af945c831f2---famujof.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/7as1ujt1fgnvl6c7694cg0rp8j/ketinesixaxale.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/vanugebom.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfea8d5e21b---8384978600.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/31e1c98925f3bae371e8e6e968f67941/xigatu.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/91tpokesr4uubqnm07gp41deu7/zazuzofesokeregukizanotin.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/17787235244.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa13a101f1---befonijowoxibarapok.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/zuzupabivemafamef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+can+i+check+my+gamca+medical+report+online+in+pakistanPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 17684 bytes
SHA-256: 2fc4f0848bee6b242decd1de02613b58645f11cd60427206498945729626c0f7
font_01_sfnt_off00011eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C6 16488 bytes
SHA-256: c26743b87dfacdf0858f4b0a7ceb4ab939aa0c8d2a68f1ccae901a3bec0cb177
font_03_sfnt_off00014dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD5 11244 bytes
SHA-256: 46187349cd31e1cca81a7c9a08d3a43dc5a20c667f15fd76acb82aa0621e197c

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