Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42c595f851defcc…

MALICIOUS

PDF

69.7 KB Created: 2020-12-18 20:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7f10a188f2c2c4cb84086ad5d74cb3d1 SHA-1: 7f4d99ec202f5e8ac7f2e802ca2b4184bccf1d0c SHA-256: d42c595f851defcc229ea1b3ba68b591e82b7980f26f4a686dbd573479954ea5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a link farm, with one URL pointing to a suspicious domain. ClamAV also detected this file as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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=fable+2+silver+keys+bowerstone+cemetery PDF link annotation
    • https://ponejibuwefugep.weebly.com/uploads/1/3/4/8/134879986/66d43e432a46c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_5faf774742afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5f9c90ac7c2df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f98d7d521c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5fa86f50f2e85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f873c90df042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fcad5449375b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fce5fd80356d927d7eea392/t/5fd03a0251357b44bb8a18e5/1607481859391/wedding_salons_at_wynn_las_vegas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a5b42e537a05ef144f11/t/5fc7cdf512b0cc7797417c0a/1606929909858/sufotilezix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ecec6fa-b79c-4a2a-a72f-a14db6550d2b/pearson_anatomy_and_physiology_lab_m.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e6c8df132613bbd7397d/t/5fc7ecf156f0cf066cd9af48/1606937843360/english_grammar_lessons_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1609391b-26c6-4204-bba3-e13a8e26bd1f/74613527894.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_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 5492 bytes
SHA-256: 9c17e128f59d8c0aaa63d9baf55ef48b8355a131add635ea2a3e0316ad56b5a9
font_01_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 10416 bytes
SHA-256: 31066e7806464de6b74ddeb8445eb1518d4eaaa8b9998f9b7d1354d7c3dd14d6

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