Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29a574be2233289…

MALICIOUS

PDF

83.2 KB Created: 2021-04-06 09:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97a6dc59525472736ca68de879af408e SHA-1: 8129984a2a4e61d2fed9a0a68755798cf3b8a34f SHA-256: c29a574be22332897d6a9e0bcf6e65c4d6c0a5b15f9b78f18c1344bb4c5c067e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/aws?utm_term=pg%2526e+planned+power+outage+address+lookup PDF link annotation
    • https://cdn.sqhk.co/raserijene/djbWijQ/sports_connection_camp_charlotte_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/ijihhdm/calligraphy_handwriting_book.pdfIn PDF document text
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/xofevitezujil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_60374cc1622fd.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/7Dhcjem/sazefu.pdfIn PDF document text
    • https://cdn.sqhk.co/zepinima/VUkhfig/age_of_empires_3_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/bagekaketox/75s3haL/manager_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_6058c8b23bbe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470409/normal_5fcbaa4bcb563.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/Yyhibja/disefa.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/iXjeRge/the_king_of_fighters_98_all_characters.pdfIn PDF document text
    • https://tevukebejesa.weebly.com/uploads/1/3/2/6/132695492/kobeveleb.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/WXJaL8k/94931423809.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/gokezuwilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/slavery_in_ancient_greece.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/esl_superlative_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/theories_of_motivation_with_examples_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/tumuvumowedisurugarivopog.pdfIn PDF document text
    • http://puzuritutu.rf.gd/bienestar_animal_unam.pdfIn PDF document text
    • http://jipipazed.epizy.com/certificate_of_origin_malaysia.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B20 4332 bytes
SHA-256: 5a266e4aa3547b12d0588b43cfb3b88711c09571ebe348eaf23740e4dd3fa199
font_01_sfnt_off000119ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119ED 11504 bytes
SHA-256: 9cfc14a6591287c912009047efee8489c8433d52ca5d6888ab1ae06270c86b91

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