Malicious PDF — malware analysis report

Static analysis result for SHA-256 351238f9a0ddcc1a…

MALICIOUS

PDF

73.7 KB Created: 2021-04-04 05:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5111775e660b4646dbfd67cac1943ea2 SHA-1: 5eefafadb71ead856ced9b2c9f656c9e0e75685b SHA-256: 351238f9a0ddcc1a08132487878232a576261b7a3066d81526739c5debd487d0
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/123?utm_term=lacoste+jacket+size+guide PDF link annotation
    • https://cdn.sqhk.co/seseniluvus/fijhhhf/42322278006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_60444049bff70.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/5888012.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/peronixugumar-benopunovig-mewinilev-xitekekazive.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/WQ1i0y6/36589508250.pdfIn PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/ea9fb5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470542/normal_6058704ee1670.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/4780445.pdfIn PDF document text
    • https://puziwurawube.weebly.com/uploads/1/3/1/8/131871408/xinonatidasarut-ninagulu-sufinobetugixef-jenasokuvigezi.pdfIn PDF document text
    • https://pogixovupo.weebly.com/uploads/1/3/4/6/134690118/nubawijal_piximiduvokiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_6027f7be17f80.pdfIn PDF document text
    • https://kerixagagunusuz.weebly.com/uploads/1/3/0/7/130776265/aa0c3c43.pdfIn PDF document text
    • http://gta-msk.ru/motorola_moto_g6_xt1925-2_manualst99l.pdfIn PDF document text
    • https://nunajamedagafep.weebly.com/uploads/1/3/5/3/135325778/460560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_602d77ae2dc8a.pdfIn PDF document text
    • https://joxejiduzimomad.weebly.com/uploads/1/3/1/3/131383973/7260538.pdfIn PDF document text
    • http://pannochki-art.com/tugogine4lvvv.pdfIn PDF document text
    • https://nafipitomaw.weebly.com/uploads/1/3/5/3/135349771/noranogato-voridumadeburuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5112 bytes
SHA-256: d5d2c4e4e277875d19b8807ca98a4b2427a88ac6a2534bc0aac2dc5e9e9e13b3
font_01_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 10468 bytes
SHA-256: 2014ed0ef62974f01cdf1c696227af7997132bcc6bb620d2930247d8b9341ddd

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