Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f1c131b79d9bfe…

MALICIOUS

PDF

81.6 KB Created: 2020-12-13 16:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fc7c79a07891cfd2443f93b2ca0cec4f SHA-1: 8aa3cee04a2c1f22a7e823f649f164cb77fa3c28 SHA-256: 46f1c131b79d9bfe30d9fdb26436d0325ba9a05e29b1470db2e035de59359417
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://trafftec.ru/strik?utm_term=tablet+weaving+pattern+generator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fcf44e87bedf.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/xigezuletokadepubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f9886f1ecdc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5fc9a4bdb19ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f871a8ff3a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5fafa5eeaf061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454172/normal_5fd06ffcf0ef2.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/44287201-cad7-4658-a129-6254f315e3d8/kigawezifalakeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638c3a91-9e41-43b3-98c8-5e3d87a0c188/hit_me_baby_one_more_time_chords_uke.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed4f1452f90b7fe57e24/t/5fc366f408845d0924f51dbe/1606641397504/70490769146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac1f1e4-fc68-4e6f-b1f9-296240ca37e5/47252610329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d069e2b-aeb6-4ce7-a2c4-e6578213752a/38737759598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd6bc92-054d-476c-b8b8-9cb26c37c419/fifagobabagupatavowizog.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_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 5052 bytes
SHA-256: b2324f8882bd6a2632f1c125d6ddc72f32d40bd69d4b2dba8bed89cc1425483d
font_01_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 10272 bytes
SHA-256: 515cbe6a08bb9ca0fd59fe526729a34a24e0ba00cc22dd5f8745513b93adbf5d

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