Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d43aa76045d8ce9…

MALICIOUS

PDF

109.6 KB Created: 2021-03-19 03:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fefa17ed2d3d95326aecd5adb4b04ac4 SHA-1: 6e88338f2f43c5d9e2b7a2cacecb40b09124fec7 SHA-256: 3d43aa76045d8ce91dfcea1f6e7580a117452beef503c9809b28078218dc3c84
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://xezojetit.ru/award?keyword=el+camino+del+artista+pdf+descargar+gratis PDF link annotation
    • http://juzufezike.mygamesonline.org/lonisoxupifaxu.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/81079329795.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/38968833195.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/fji9iaR/white_huns_strategy_attila_total_war.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/fedigegesavuzeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zurajekiviw/Vic1jbM/big_button_mobile_phone_for_seniors_australia.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/zupezoletisejifufemuju.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/hjKgh3D/69186659551.pdfIn PDF document text
    • http://cloudplay.xyz/diwobexuduzomavr4s4g.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/Jjcji8e/87085955605.pdfIn PDF document text
    • http://universityru.fun/math_equation_meme_templateam29e.pdfIn PDF document text
    • http://shtampshop.ru/english_for_research_paper_writing_pptqw45a.pdfIn PDF document text
    • http://vpntop.info/302655702206wvwg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c6dd2c-67c2-4d20-832b-7634b8b7cb72/redalufonajutonoke.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/vezurozi.pdfIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_f57afa0ce3a54ac0bce7f03286215f01.pdf?index=trueIn PDF document text
    • https://abc5f1b3-ad37-4660-b048-d9bff2240d70.filesusr.com/ugd/a1fb68_9c5c68bba5d44c8f8a380e46a76ca7d0.pdf?index=trueIn PDF document text
    • http://kepagewav.atwebpages.com/89657150377.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_f90466a023804e089a7a9d73b4a77647.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af04b82b-128d-4846-8229-f808d5cc3341/how_to_clean_bosch_tumble_dryer_condenser.pdfIn PDF document text
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_59efefe8822b41d2ac7da458dfe88396.pdf?index=trueIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/26593420884.pdfIn PDF document text
    • https://e064a861-6c7b-46af-b67a-66be1f32d776.filesusr.com/ugd/ec3e4b_8760b105451344d4b7a56b3aace1a753.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13360 17164 bytes
SHA-256: c4867e6dca82703f10ff6c2d8acfe0f41a2b621860a83164f4bbfccdb2a5d467
font_01_sfnt_off00016a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A10 5432 bytes
SHA-256: 76caf69f00b77bc07aa52c2b3a2baa741353ecef08ca0d768fcddc488875edec
font_02_sfnt_off00017c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C79 12992 bytes
SHA-256: 906f68368a6e645a30e62dfb54bef28790cacaf0ac9ed3db38e8094f046b05f8