Malicious PDF — malware analysis report

Static analysis result for SHA-256 372193984e11471e…

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 05:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18494d548104b39915052302254591c5 SHA-1: 70c32bde8210e5b0afce8bca1239d0dc3b644513 SHA-256: 372193984e11471eb8e0a3e3e5c3a9d7b115a052b869d5d156f1cf8fbc20e2ac
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://botokaw.ru/award?keyword=personal+loan+agreement+sample+pdf', indicates a lure related to loan agreements. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://botokaw.ru/award?keyword=personal+loan+agreement+sample+pdf
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5fedd4cf51774.pdf
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fcf17b382156.pdf
    • https://meremunodimabak.weebly.com/uploads/1/3/4/5/134516451/fe8590dc02a3201.pdf
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/sepikaxafu_jetotugezulawif.pdf
    • https://cdn-cms.f-static.net/uploads/4443371/normal_602d073b21322.pdf
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/2731424.pdf
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/faboregexifexamini.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/viboxikuz/4774850720.pdf
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_16dc9e410aff4e3c87b98d514b61756f.pdf?index=true
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_ac3518b56a5d47268c00ddc74be70a3f.pdf?index=true
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_5191a6e64119441c80a725e302e6487d.pdf?index=true
    • https://s3.amazonaws.com/babuxufarizuxur/nonprofit_bylaw_template.pdf
    • https://s3.amazonaws.com/siwixomudit/80184666622.pdf
    • https://s3.amazonaws.com/juduk/management_position_cover_letter_template.pdf
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_21e23d9fe0d742309c5e49222c8a6c97.pdf?index=true
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_9e665bd943d04ac0840d0f85900a37d6.pdf?index=true
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_66f341eef14948a3b9e09648eb74dc2f.pdf?index=true
    • https://s3.amazonaws.com/zijivevip/preschool_weekly_lesson_plans_templates.pdf
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_61c9a2b205a44ad3b1156cec950e0d1a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e8.bin
cfaa16e56179e94fa657272120111fbcc02698cdfad2f65286ef802599cd8d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 5104 bytes
font_01_sfnt_off0000f928.bin
effbd8a2563fb87e55d44d38e1d63b79b8f51230d798ae18c81b3bbcec04ce59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 10424 bytes
font_02_sfnt_off00011cd3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 4324 bytes

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