Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb010843869fe60…

MALICIOUS

PDF

124.8 KB Created: 2021-02-23 14:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 15699d525f24609934c3e0d238619746 SHA-1: b6c7b9cd4b2d8f6ad09310f50acf24ac1e00f085 SHA-256: 7eb010843869fe60103d461bc53fdf15746ce23ae218859837022b88f51f84e2
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and redirectors, indicating a link farm designed to lead users to malicious sites. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=ralph+waldo+emerson+historical+significance PDF link annotation
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/8e45369086.pdfIn PDF document text
    • https://kujivorel.weebly.com/uploads/1/3/0/7/130776875/waxim_bijevetojilis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_6033a3b917cdd.pdfIn PDF document text
    • http://ridunculus.com/78374045696pmsk9.pdfIn PDF document text
    • http://armada.technology/ignou_convocation_2018_formxv8ks.pdfIn PDF document text
    • http://baykamif.space/big_rig_lendinggfw2v.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/ijagju3/duwakuvuvofumufanogev.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/c271b7.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/hi7hiv4/vududikebajudaluxunol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fe097d38b667.pdfIn PDF document text
    • http://eagleaff.com/kefibileetj.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/zggLgHQ/bowling_alley_kingston_pike.pdfIn PDF document text
    • http://shishkin-seed.xyz/53025409485beqmm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_600cc1fa2e744.pdfIn PDF document text
    • http://geesecam.com/absolute_value_worksheets_kutaqpnqq.pdfIn PDF document text
    • http://purumobakeleju.22web.org/marathi_sad_whatsapp_status_video_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogelejulogowev.rf.gd/how_to_apply_big_vinyl_stickers.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_off0001aa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA45 5668 bytes
SHA-256: c5fe390db12ba32d0136cc6c682973aa027f3a1fce3d2bc92579a8056f47714f
font_01_sfnt_off0001bd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD7B 12088 bytes
SHA-256: 58ed479128d7580579b37240a9ae917210911e64ab19bf747e7008695630811f

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