Malicious PDF — malware analysis report

Static analysis result for SHA-256 920f92c508f3bb3c…

MALICIOUS

PDF

79.1 KB Created: 2021-03-23 17:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 60a2dd57601da84fe4116b725349e486 SHA-1: e0a84b41973bc7262151cc0c15a49b9690ce4d1c SHA-256: 920f92c508f3bb3cff55a0d173a29b7ffbea99fe7e44cef4d5865b2d107b8966
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://druttle.ru/123?utm_term=ten+top+biblical+archaeology+discoveries+pdf PDF link annotation
    • https://cdn.sqhk.co/vinogusi/heEjagd/padesopoboxoporob.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/nevalodug_lufifokajige_pilikuv.pdfIn PDF document text
    • https://beselawomipux.weebly.com/uploads/1/3/4/4/134472501/putanup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490367/normal_5ff806ee2ed52.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/Tgj2ic3/78091491817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_601376ebbc3df.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/kuxoregekuba_fuvixiximoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/uA1hahi/nonstop_game_cyber_raid_redeem_codes.pdfIn PDF document text
    • https://lofuniwap.weebly.com/uploads/1/3/0/8/130874201/8639959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_601cff175bf6a.pdfIn PDF document text
    • https://dukavudo.weebly.com/uploads/1/3/5/3/135328319/1198439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_602b5949ee075.pdfIn PDF document text
    • https://wiwujakibites.weebly.com/uploads/1/3/0/7/130740442/472f1de.pdfIn PDF document text
    • http://vedevedonumizak.iblogger.org/presidential_or_parliamentary_system_in_pakistan.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/4b9be05b.pdfIn PDF document text
    • https://latibexuwer.weebly.com/uploads/1/3/0/7/130776356/mojevinob-siwon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lususexore.epizy.com/infrastructure_definition.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_568ae61532a64da3b1b5704366bbe38d.pdf?index=trueIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_daf17d22ce674617b0eb55c46a11a7c8.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_06fb696e33e84672ba3ec429e9afdfc1.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_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 5668 bytes
SHA-256: b36ab895116946d38aaa20c9b393423cda68b4d5993c4fe6f14d0f2c7b77de9e
font_01_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 10912 bytes
SHA-256: 8f0be5256e956690042f787b23fe10f0f61a6d4416336a2e0c8f38d58150972e

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