Malicious PDF — malware analysis report

Static analysis result for SHA-256 222f8727062a960f…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 04:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 22d9c651b9e23b2de1c11bec5c6982bc SHA-1: ade0784bb23ee6d9eb0e49ee267370ef7aaa3722 SHA-256: 222f8727062a960f641431e87b941d8ff86986dc1fe8ea3fd4d9e237249dbe99
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.bsa.by/ckfinder/userfiles/files/57752215859.pdf In PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/67904100893.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613422fe5ada2---42274873733.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/96977128570.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/xulalapojosawedi.pdfIn PDF document text
    • http://soles2walk.com/data/file/64334807388.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/fulakor.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/54233876644.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/46154757964.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/15705528866.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109021148137957.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/94846920158.pdfIn PDF document text
    • https://ags-car.com/upload/files/93026715220.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/12464217304.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/kirerif.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/tudexumo.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/wuwozuda.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/84122726673.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/nujinuvitidexew.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cfc81d631bcc42776a56127a58fcc3ec/rimazupuvoz.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/6831162683.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/nikivazufalajunofoke.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/59616619013.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/genemiwutofevinopux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+clear+searches+on+androidPDF 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_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 17452 bytes
SHA-256: c694813e40b1b8430c485ca0b60d0a32de0699effe924243bc2f9d008315548d
font_01_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001223f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223F 10544 bytes
SHA-256: d6c75cbc8de35911cd2d2cc5174dd7f4ef8233aadc1a1cc58b0f45d61c6c07e6

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