Malicious PDF — malware analysis report

Static analysis result for SHA-256 5029375aefc29864…

MALICIOUS

PDF

75.8 KB Created: 2021-04-15 22:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec94066fd64210350ec88191c5b52c02 SHA-1: 7431bf55b1bf8080c35a06a95e1dc74b7f6374fd SHA-256: 5029375aefc29864806775f18005263d91945b9424fa0517d5c4506cc4b62bfa
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://gimoguvi.ru/strik?utm_term=what+was+the+mayflower+compact+and+what+brought+it+about PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471512/normal_6022bbda4175f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_601ee6d92295c.pdfIn PDF document text
    • http://zufonirawanowo.iblogger.org/zanefow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_602ad7f743699.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481667/normal_6004be721e811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_6057df0bd5f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5fd88df03da90.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/hhJ51CF/bujalulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5fe54d83c2a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_603e64b8129ee.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/haAcibZ/online_compiler_c_tutorialspoint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446496/normal_5fdae6a714e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489717/normal_604981001d0d5.pdfIn PDF document text
    • http://xokesate.22web.org/45526180199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_7280ea2c91cc4f35abccd1b6e21cae5a.pdf?index=trueIn PDF document text
    • http://wotujemun.rf.gd/30230249905.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_249a9f68ef054915ae3ab341bc8839d4.pdf?index=trueIn PDF document text
    • http://gikuxedikejoba.epizy.com/19601309010.pdfIn PDF document text
    • https://854397d5-242e-4836-9f1e-4d22a5541959.filesusr.com/ugd/88a329_55a720e381b74829aa488618fce701da.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_436aea5690a5442e8ca891a860832a00.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE838 5916 bytes
SHA-256: fdfd16ca803c4011025aa39feb7553bad7ab02f2845d7dd7308da958eebc9c82
font_01_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 10908 bytes
SHA-256: def69e2ada116b27279daacd5305829713f10306954c6ccd4be24a9ae9d2b9b7

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