Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d2afcbaa242aa1…

MALICIOUS

PDF

68.9 KB Created: 2020-11-25 18:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6887ebe62839e72fd5d7e153ade4c851 SHA-1: 11bbf707eb53b7f4c15968d87e830a5fc235847b SHA-256: 65d2afcbaa242aa1a6a4d8d398a6b235ea46bc6a2cc6e8e92c0aceaff8815e92
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=character+arc+worksheet PDF link annotation
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/cab759916d4ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5f9c387925f9c.pdfIn PDF document text
    • https://diwixovejawi.weebly.com/uploads/1/3/4/3/134316523/vabidemopovo_gasipazuj_fufasal_lowogebuv.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/3225195.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/006fb8abaff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f877087637f3.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/minil_badofafofez_lidaxiboro_xipumokilo.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/832e050c-4234-430e-91ea-150f983c3fa2/fijogo.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/occur_synonym_formal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/526b42ed-deeb-49f9-955a-1bdd55b0ea77/gufuwedige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4dc41e-86c7-4511-b5ca-f700eb7def2a/literature_a_portable_anthology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7e2035-cd67-4684-b199-ef2fafdad6bc/68232828523.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_off0000d366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 4916 bytes
SHA-256: 87bd13929b0a7921dfab63ce4639e90f6a0e503ba896e635c24d5f48f8edec4f
font_01_sfnt_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 10256 bytes
SHA-256: 3a28dd08a77921c40fbe1f27020961942f8c0e3c9d15459afefd4061c207877d

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