Malicious PDF — malware analysis report

Static analysis result for SHA-256 8702d29e607ea42b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 00:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aa6c19515af877cbb5348b5cf6484546 SHA-1: dc0accb540f0ca38210a63eb86d6aef683dbe268 SHA-256: 8702d29e607ea42b03ce4e07f502fdba83f36db4c8d328f9c074c0fe4f5b15ee
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://seumenha.ru/123?utm_term=tesis+de+administracion+de+empresas+pdf+ecuador PDF link annotation
    • https://cdn.sqhk.co/kosenopelid/gdo4Ggd/jekiregumozamele.pdfIn PDF document text
    • http://koteyarn.moscow/conair_turbo_steamer_reviews2cwgx.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/hcif7dT/one_gold_app_review.pdfIn PDF document text
    • http://skameyki.club/56380944446u5mr.pdfIn PDF document text
    • http://legalvictory.group/florida_realtors_residential_lease_agreementp1adz.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/1hcX8V2/63826195864.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/8PQhgmS/71871026843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394073/normal_60527bf58a553.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/mpchbgf/sapidorimulixitenivid.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/Chjhcoo/latidaxijoviburip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_602424032b900.pdfIn PDF document text
    • http://moresukko.ru/93361975311tb0d7.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/fijgik2/web_designer_jobs_in_pune_kothrud.pdfIn PDF document text
    • http://lukezelulevuf.22web.org/foxurelizuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_1b607ef7c890490ba402caa2df9e06d8.pdf?index=trueIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_15838ca5cac740b39caf9a8a23045d3d.pdf?index=trueIn PDF document text
    • http://fefipunoz.rf.gd/hmdx_jam_wireless_speaker_manual.pdfIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_bca12b8f8bad4ad38e461927063105e5.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_27a74f1661f149819304c0ba6c561371.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_9c14349e2995420cb0e3830449457aa4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 5220 bytes
SHA-256: 55f23ae716f8fe78caf1400b8d6453d1ef19aeefe86d00b3d6e8a44ac17ac6ef
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 11940 bytes
SHA-256: 0be97bf6f2ed64b2a855203ea40a029602a58fcea4aa290591d01fad13fdf9b9

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