Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd9e180876b230f…

MALICIOUS

PDF

73.1 KB Created: 2020-11-17 19:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a497b22adde7dc465f23580b50ce6803 SHA-1: e18a40e1372c0faad9c46c4a6e596a56a40086a7 SHA-256: 0dd9e180876b230f222d8d817c931f1e7892f1c8feca24621977af5e39d8e9b4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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, which is a common tactic for SEO manipulation or distributing malicious content. ClamAV detected this file as a phishing trojan, and the ML classifier also flagged it as malicious. The presence of embedded URLs and the heuristic firing for PDF_SEO_LINK_FARM strongly suggest a malicious intent to redirect users to potentially harmful sites.

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://traffnew.ru/123?utm_term=passive+voice+in+spanish+exercises PDF link annotation
    • https://fivakamine.weebly.com/uploads/1/3/4/3/134384559/803a58ff5ebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5fa93debbeb46.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/rivoguguve_menidepojak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_5fad91337ea9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f874d9911cda.pdfIn PDF document text
    • https://wavixupenug.weebly.com/uploads/1/3/4/3/134386336/dekap.pdfIn PDF document text
    • https://gokisixoxi.weebly.com/uploads/1/3/4/1/134108612/3508411.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/9b52a819-e1f0-4881-bf44-95a4451bd656/university_teaching_assistant_cover_letter_no_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce39d18e-cae0-4ccc-b162-79b72e16a345/pururigatolalixedikelake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb06142-0b01-443e-a8c7-2232f7ba3f5a/evenrude_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2ad16f-7767-430a-988d-bbc60b9604cd/4011240053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf652e8-7f2a-44b7-832b-e358b2c8abf4/al_stohlman_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723636cb-da73-4f63-8370-9844c1a1ff15/zusafagapu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5120 bytes
SHA-256: 973a37963473384ef35b51c145f6f75abd873be6720a7d56ae4f2db155e107bd
font_01_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 10368 bytes
SHA-256: 869f972f736b8edd35e7a8684f869998bd5a26046bc336a87e8b566b327ed24d

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