Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc30519502d2fc7a…

MALICIOUS

PDF

67.9 KB Created: 2020-11-27 11:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8caa34d6b034790a5e5e1ea8ea767dbd SHA-1: d228da5948f2afbef20e0ce8cc5669f3cde3d4a7 SHA-256: dc30519502d2fc7a32f2de458a40992109b1e6d661b4f1992df64a088ab9180f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'https://traffnew.ru/strik?utm_term=bradley+cooper+perks+of+being+a+wallflower'. This suggests a phishing or malware distribution attempt, leveraging a seemingly innocuous document title to entice clicks. The presence of a PDF link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content. No scripts were extracted, but the overall structure and heuristics indicate a malicious document likely intended for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=bradley+cooper+perks+of+being+a+wallflower PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5fbd153d20b32.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/9e4e5d8f19.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/ruvus_fexafurimiditi_tamasetodefa_gimajubadare.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/25756735-e6f6-4f01-a2a5-33d9b9d2a4eb/simcity_4_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69809e1b-ca17-4e35-8950-3ed68ba0161e/suninuganizara.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/97573028810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85276454-0673-42c2-bd88-e0f92fccecf9/87182286062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43bd489-fdf1-4b41-ad67-40a693952c6a/cruise_control_gta_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/wojizurilakovalogi.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_off0000cbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD0 5768 bytes
SHA-256: 74171406e6d955d1e1aa812e603cc07ed920ade069c66ce20ea975b15f32c720
font_01_sfnt_off0000df9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9F 10388 bytes
SHA-256: 363d812c740899a8a7852851b01d8654d62426bbea1fed442f228a94045792af

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