Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9612019fb8f0f6…

MALICIOUS

PDF

66.6 KB Created: 2021-06-11 00:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b179b6ada90579b8ca31d055ab16a9c1 SHA-1: 05e722f34a2099a489060ae2cf35d005a5282435 SHA-256: 6b9612019fb8f0f662eeebb92aef506e4b33c2d570117e053bfae1cc07e3c037
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO spam tactic. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as phishing and trojan activity. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8183

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://garglob.ru/pbw?utm_term=best+way+to+farm+silver+raid+shadow+legends
    • https://static.s123-cdn-static-d.com/uploads/4484835/normal_60b1abdfeed97.pdf
    • https://cdn-cms.f-static.net/uploads/4374851/normal_60241cd1bfd86.pdf
    • https://cdn-cms.f-static.net/uploads/4501360/normal_602fba4e89b0d.pdf
    • https://cdn-cms.f-static.net/uploads/4368477/normal_60251ed93af89.pdf
    • https://cdn-cms.f-static.net/uploads/4471250/normal_60c0bb7836365.pdf
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5ffc93dc799c0.pdf
    • https://vuduleputasi.weebly.com/uploads/1/3/4/4/134488699/rugorerakew-pedametebekud-sofuwoxu-dofun.pdf
    • https://cdn-cms.f-static.net/uploads/4426820/normal_601afa0473052.pdf
    • https://ratanamiwul.weebly.com/uploads/1/3/4/3/134327333/8623107.pdf
    • https://static.s123-cdn-static-d.com/uploads/4367268/normal_60b3bcbe80626.pdf
    • https://xuxufagitagagi.weebly.com/uploads/1/3/0/7/130740521/foworuto-zufoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gupiguna.pbworks.com/f/28204199214.pdf
    • http://fodorafirig.pbworks.com/f/libro_el_mundo_segn_rick.pdf
    • http://vobaranizume.pbworks.com/w/file/fetch/144827100/ace_stream_media_android_tv.pdf
    • http://nidibewuzi.pbworks.com/f/school_of_dragon_mod_apk_whatsappstatusimages.com.pdf
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144857925/apple_30_inch_cinema_display_tech_specs.pdf
    • http://zezimin.pbworks.com/w/file/fetch/144411726/15402790286.pdf
    • http://wixugigir.pbworks.com/w/file/fetch/144458661/man_days_lost_calculation_formula.pdf
    • http://ginosofep.pbworks.com/w/file/fetch/144889017/posubamotu.pdf
    • http://jesababa.pbworks.com/f/kalimas_in_roman_english.pdf
    • http://gibabug.pbworks.com/f/how_to_become_a_dental_assistant_uk.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54b.bin
1f0923775e0660acf85f3435f1773c2fed37ab80b628ab2b72e4ef17fa994a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 5624 bytes

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