Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c215b4aae2b2c1…

MALICIOUS

PDF

70.0 KB Created: 2021-05-18 12:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1eeac7e031478fd507d81a9b4ad8cbbb SHA-1: f9ef6532a18d16870862f948de2b5c3cbdcad93f SHA-256: e6c215b4aae2b2c1ebc8d1f5cc2814e8d4d91d9c6bd22f4388ac8a4b8b42b41a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one prominent link pointing to 'vilenefex.ru'. This, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The PDF structure and embedded content indicate it's designed to exploit users by presenting a deceptive lure, likely related to account information as suggested by the URL parameter.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=how+to+get+account+number+for+t+mobile PDF link annotation
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/xokipis.pdfIn PDF document text
    • https://sisuveraxom.weebly.com/uploads/1/3/2/7/132740665/8601601.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/waxipoki-nebonofi.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/d6704fe9a3063.pdfIn PDF document text
    • https://mubikopupisuf.weebly.com/uploads/1/3/4/7/134711770/dozazujokuzig.pdfIn PDF document text
    • https://waretopaze.weebly.com/uploads/1/3/4/5/134529701/mojagonovoxado-xixadubepu-xibupetugarige-sagixobefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patilawasu/tadukotoludanen.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/4510374209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88686d9c-3f57-4997-ba2a-1bcf38611923/cultural_theory_and_popular_culture_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/hadees_books._in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cca27f3-aa9b-4c6a-9fcd-f2af8f77f8da/jipiwuxexojamowerekeji.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/canadian_immigration_forms_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/candy_crush_saga_online_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a104ef7-a255-45e0-8b72-bbd031dd1265/33211998044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd80aa73-6c9b-4047-8561-b51e67383b16/2882068882.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/how_to_cook_frozen_chicken_in_power_pressure_cooker_xl.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/dragon_age_inquisition_quests_guide.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_off0000d61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61C 5216 bytes
SHA-256: 7b730fa2699ae870ce489eafb4587eb7f7b3c05e4a86f26e7e8f6c749365bb78
font_01_sfnt_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 10308 bytes
SHA-256: d6b80e4d119099e43df6ebebc758686249b87632efc00d668c9f8d303c64330b

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