Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eac47e77458c843…

MALICIOUS

PDF

78.6 KB Created: 2021-05-23 01:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6c79797e90a6458e46ebc339156a98eb SHA-1: 8c5bee7ef733d6eb64595b0d7f3118e9b1ff9588 SHA-256: 1eac47e77458c843eabdfa09b019ed2709628bc12ecb21731f32a9d352695795
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://pelibifir.ru/strik?utm_term=how+to+make+honey+glazed+ham+from+scratch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490722/normal_6009d41d1ba47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_602479567fc81.pdfIn PDF document text
    • https://nozitobolilijaz.weebly.com/uploads/1/3/4/4/134473425/2948325.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/kezevukufubaruvomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479921/normal_603ee10259a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_600ba104cf582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_600bd83bcf74c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489853/normal_5fc6775a8df20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd628d05e75f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_600fb92a62572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_60113664f313d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/runescape_dungeoneering_guide_1-_99.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14df0cf-555c-49f0-8bf1-e384c2332682/vivovasewovan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe1f309-d995-496e-83f2-9ec323164573/zenutemejipus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd06925-5226-4fe1-a43b-be2ed9e21e19/34930383999.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/9574025732.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/what_is_another_name_for_conflict_diamonds.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/lazere.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/90_minutes_in_heaven_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/8_week_olympic_tri_training_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/cayetano_v_monsod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d91a65-132f-4eca-a2ef-508a48575c0c/yamaha_moxf8_vs_modx8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972dde45-d711-4beb-b015-6c5aac34bac2/8714355871.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/research_paper_on_automated_guided_vehicle.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_off0000f53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 5704 bytes
SHA-256: ea95db3eff8e3168052204bc0977607b3cf564721c7ad1cc3f4f686360600dd2
font_01_sfnt_off000108a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A4 10528 bytes
SHA-256: 6a14d4f1e3e49ac0b6011128f168110f5b90e0584e1679675a4488344af245bd

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