Malicious PDF — malware analysis report

Static analysis result for SHA-256 02efa767af8be503…

MALICIOUS

PDF

76.5 KB Created: 2021-04-25 17:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0ed9ea3d3217bc3650359e0e4d5f18b4 SHA-1: 5272314fba86b38611d60f0c889cdaa48285cdf5 SHA-256: 02efa767af8be503a08cef66b7708281461c57a29c49d14b8b5bf59ef747e85d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://mezovuduw.ru/strik?utm_term=does+bose+still+make+a+radio%252Fcd+player PDF link annotation
    • http://whalesqpa.fun/wexegudovamdi4f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502178/normal_5fe178551a830.pdfIn PDF document text
    • http://kupivse.xyz/problemas_en_paraiso_chapter_4_summarylpllz.pdfIn PDF document text
    • http://idealsit.space/wejuwobovolifijopuwoves0a906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_6031fce33a5da.pdfIn PDF document text
    • http://prechambre.xyz/847604909032zwq7.pdfIn PDF document text
    • http://retys.fun/power_pistol_offense_playbook5rv2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_60259f9de3c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_605054f8339b1.pdfIn PDF document text
    • http://cocobuka3.xyz/assault_cube_2_portablexyisj.pdfIn PDF document text
    • http://eferevole.com/supegof2tkop.pdfIn PDF document text
    • http://safetymirrors.xyz/susib4jk3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_601299df0b6ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494136/normal_6066875564a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_604846c736e83.pdfIn PDF document text
    • http://boomua.site/sulupubej27cn4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5fcc0fc8a133b.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/14b1bebd-c1c2-496f-a1ec-c059cf36182c/install_britax_marathon_front_facing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eeae17f-a45f-4a6c-b5a2-e2b422c074bc/xasuwibifujelek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a08d253-e9df-4b85-aad8-120031535d99/81953000998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0709bd3e-9e8a-4bc9-9109-dc61a1a06c53/16097842635.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_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 5560 bytes
SHA-256: 06887892fbe6e73f515e8b87b5f9d36a36629486383558aaf6b105d49cdcda62
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 10484 bytes
SHA-256: 5bc45c50810ad68a77aa509f2b0d7f2ffecf834a3db66405c4534a31c9e59609

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