Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f02604a0f45ee6…

MALICIOUS

PDF

65.2 KB Created: 2021-01-01 21:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 05f6d8c7c8fc72ce69a87a12195459bc SHA-1: b79df1f6d65418fa7508c72ec991610df110b49b SHA-256: 47f02604a0f45ee65777ddf643ae2c575006fc46871de7667f1b7535694a51d2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or link farm operation. The embedded URLs, such as 'https://trafftec.ru/strik?utm_term=craftmaster+leather+sofa+prices', are likely used to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafftec.ru/strik?utm_term=craftmaster+leather+sofa+prices PDF link annotation
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/lumaso_gaxevona_zepuzarerosikag.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/zuguxodimer-ratolulamepejaf-vorut-xigusesetef.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/hdhhMhd/fox_sports_go_login_roku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5faf5db11f259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5fa1d99a233c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421210/normal_5fc677335b024.pdfIn PDF document text
    • https://giboramogu.weebly.com/uploads/1/3/4/6/134627050/xogulupedubilewor.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/sekusibavave-vogud-vitovexupida-zoben.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/jojesupo.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/M8zqLgd/luxuvo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bubeto/55473399827.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/57129536277.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB623 4960 bytes
SHA-256: 5e90d61ab18a85c7d334e371f0f58dd9e1a1043993c01192cdd00131d93c49db
font_01_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 10380 bytes
SHA-256: 4918e07745e8b5143c8116756f954e5c2d938992a151953b5aa5b6b05f835081
font_02_sfnt_off0000ea49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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