Malicious PDF — malware analysis report

Static analysis result for SHA-256 762697509fc8eba3…

MALICIOUS

PDF

62.1 KB Created: 2020-11-14 19:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 29b83f27913e5fedb445bf9694dcb3c8 SHA-1: 1ee4e355e4950324b0ed13b12851af491869cc33 SHA-256: 762697509fc8eba3b6239db3b85ee688fba90d7a8915790917a56afd0cc3caac
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and includes a UTM parameter suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=listening+skills+worksheets+for+grade+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5fa33bf65ae82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_5faed15940bbf.pdfIn PDF document text
    • https://guvapokasek.weebly.com/uploads/1/3/4/4/134437462/wupamifalole.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/6317955.pdfIn PDF document text
    • https://xakabitugaret.weebly.com/uploads/1/3/4/3/134366923/turuxodusodiv-xitupemonobaru.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/mepipasojur-kewujilazeka-monixe.pdfIn PDF document text
    • https://lofivate.weebly.com/uploads/1/3/4/3/134307733/subagunapig-puzobopewil-biborapezudawo-feputakef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a6de1b-412b-49e3-888c-f08967a98dfa/49837062494.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/voiced_and_voiceless_sounds_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcde9bc-8da9-4162-b2b1-c09706444c84/pharmacotherapy_principles_and_practice_4th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/word_with_endo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe09d295-8116-4d93-bf76-9a66fb20ad9d/petogobumulajuzedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abeeca2f-72e9-4920-b705-0286cfd63d32/44403910015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f49edb4-257d-48ab-9544-ce8170ef9561/sadonebasepaxopiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97a9a33-0c7c-4d1c-b59d-73b99fe67e63/ethnic_hair_sims_4_cc_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999c94c1-cd3b-4725-aded-35fbaa6b5ace/geometry_1.2_segments_bisectors_midpoints_worksheet.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_off0000b4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FE 5396 bytes
SHA-256: 018016210c933f94ae3a86119c981487dd0756435939da5839fc5b6a53f9fe6c
font_01_sfnt_off0000c76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76D 10108 bytes
SHA-256: dd7cb468ba99bc360e9951b4292ca98e2f16d60d476238684f2a90d07fdfbf96