Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4272d56f8c9e6e…

MALICIOUS

PDF

66.0 KB Created: 2020-11-18 17:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e0d43aea9edd1592638ba78878f5f61c SHA-1: 968eb399874e7f2a0a0b72c5cda494343b095341 SHA-256: 1d4272d56f8c9e6ee306ba300c7f8d4529aec0fa0485e83de1af6fec893fdb51
156 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 0.9997

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://traffine.ru/123?utm_term=get+up+get+up+stand+like+a+champion+lyrics PDF link annotation
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/2743582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f879b1895747.pdfIn PDF document text
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/a9a6a8e0f5ae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f8b56bcc9af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5fb3e86ad7d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5fb3e42075076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_5fa7c1ee2cc3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f87d63e5f570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5f94f42308641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/que_paso_ayer_2_pelicula_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/consolidated_assurance_florida.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB802 5564 bytes
SHA-256: e3505df974e470b929e3589057659a4bb61d61db618c5c18cf8b0b935c6d86d3
font_01_sfnt_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 9956 bytes
SHA-256: ce38fed90987717b5ffec19b8b1f13a527d3f6ad7faf08f599146d8f79841364
font_02_sfnt_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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