Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22f9412af75e5ff…

MALICIOUS

PDF

63.0 KB Created: 2020-11-17 13:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ad3d17d7b7e345b3b7e74246ac26b388 SHA-1: bfce3c29921fb8a97d4bdf8a18192e22aa3cad0e SHA-256: f22f9412af75e5ff0f346526d804f913d48db8f03bddb9864ca02a3f2ab4b062
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 0.9998

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/strik?utm_term=infinity+stone+meme+template PDF link annotation
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/a94fc291989e.pdfIn PDF document text
    • https://fijevomakikedu.weebly.com/uploads/1/3/0/7/130740050/delomonexijonekaraw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f87ad3f0cce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_5f9d7735dc7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f946270101a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5fa2b35c25760.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/zaguxe.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/daxegukodewaroj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_5fa92fbb2f4db.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/b2a3118e-7b86-41a2-9856-808bf6a26021/10279585196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614ff062-725b-4c80-bbd3-7906076e3d23/zipuvexapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e3b688-007a-4c13-8d54-a736e1759c6b/batman_collectibles_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/suad_bruciata_viva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845c714f-b238-427d-9652-08cc887aa0be/11082318849.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/13395081341.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/numerical_reasoning_aptitude_test.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_off0000bd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD89 4988 bytes
SHA-256: 53d1929d194a58bf07ea6ed2dc3c235b751f1ca9d5584d98c344254617f5d027
font_01_sfnt_off0000ce82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE82 9532 bytes
SHA-256: 8292fa43474b36042fe007bc0ccf18d7fb4d26be1e2bf552cb79e55469ca895d

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