Malicious PDF — malware analysis report

Static analysis result for SHA-256 c195d2529672eff2…

MALICIOUS

PDF

84.5 KB Created: 2021-02-18 01:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6d4e4792bfa695bc89911f7e34c2c83f SHA-1: ca0346901e8b2c69a0471745915c6e1566e5b09e SHA-256: c195d2529672eff26d11a0c4a2fa2e0d33cb6c1910f183691079a1ca533bbbe0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan payload. The embedded URL points to a domain associated with malicious activity, likely serving as a lure for users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=technical+drawing+application+definition PDF link annotation
    • https://cdn.sqhk.co/timadupak/hfyjgj0/ziwukekijeriniredamikuj.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/sijoxoziwusu.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/e8d11.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/SDjcTQ8/37465024754.pdfIn PDF document text
    • https://nukoxola.weebly.com/uploads/1/3/1/3/131380146/4885065.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/gelat.pdfIn PDF document text
    • https://wedodoto.weebly.com/uploads/1/3/5/9/135993452/gafipuniluzez_jidapasisedu_mitudubivogux.pdfIn PDF document text
    • https://fepanaxowa.weebly.com/uploads/1/3/4/3/134311119/e1a57.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/e8dd05a16a7.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/xorawuv.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/4732237.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/52cc2d90ff2226.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/0cd11007e1.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/jarirotexab/4255991555.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/67962433289.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/mandated_reporter_number.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/drudge_report_rss_feed.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/89742770372.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/jingle_bells_piano_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/asthma_guidelines_rch.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_off00010d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D12 5280 bytes
SHA-256: 5a6d7cc5cdde4fa220d4aa0b729b60754838ad05802f47e2fcef16ad41526463
font_01_sfnt_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 11048 bytes
SHA-256: f86a48c984d073fd6504caf0374bff5c5089fdbc9703ba010be52955887c7b57

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