Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a60e5731ffc457…

MALICIOUS

PDF

73.3 KB Created: 2020-12-24 17:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 77ec32908635b7f509206c5f9168dbd7 SHA-1: e208ee1561cf0ec62754345553b743bd8556fb9b SHA-256: 02a60e5731ffc457df1f6c66ee7fbb6d2a7b09a96c0b547996e4302be5f2b769
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to Adobe Acrobat and wkhtmltopdf, suggesting a lure to trick users into downloading a malicious file or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=adobe+acrobat+dc+continuous PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446036/normal_5fd0fdf76b709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5fdaf5e485acd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465703/normal_5fdd9a4a899bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5fc08d1c7f193.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/HjbK5bo/74831574828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5fc52d1ef2f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5f93582285262.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/d195164a-cdfa-46e8-a27d-a286d3d524eb/peliculas_del_caballo_rojas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a388d2fc-7638-49fe-98b6-63eaed5e782e/fujevuzivopufimimakijaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3129931d-cd4e-440f-b8fc-26187160f4de/jelavumumitadurojuwux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2eb48c-c6a6-49fc-966f-eb793713296c/rival_ice_cream_maker_recipes_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbeb55f-489b-4a04-8018-19e0584c4c5c/teriradulojerosumov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4f58e8-f665-4ff6-bc62-40f4d7e29a09/16293102681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b247e99-6f5e-4e08-8d6f-3dd0eabac2be/wunobavemafekewefabip.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_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5032 bytes
SHA-256: c8e187791714a63c12a5fd225e6a10fcc3dfad61f5286ced40226b4ea17435e9
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 10808 bytes
SHA-256: a504e5f897dd2b68e91cc930d67287686a8add171eb52b4008487295d681fbdf

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