Malicious PDF — malware analysis report

Static analysis result for SHA-256 c314e3825cecf8b2…

MALICIOUS

PDF

69.2 KB Created: 2021-02-20 03:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e977c5f5b21188c4ac885bc9d522afb8 SHA-1: b0440cea80eec320cb86ea076254922b86951b8d SHA-256: c314e3825cecf8b267532db6c499ac9b8d58734d9f8772c4878639ab415d4414
156 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 other PDF files, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful 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://baarspo.ru/wix?keyword=bike+race+mod+apk+download+latest+version PDF link annotation
    • http://bupetud.xyz/387803778650hk34.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/hcgdx7Q/war_artillery_tower_defense_game_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5fddfb3d805ad.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/gU2hfje/h-_e-_b_money_order_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/7BCWvYP/akinator_apk_download_android.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/vOeNjeW/middle_finger_emoji_disappeared.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/fgdgijj/casino_card_game_rules.pdfIn PDF document text
    • https://tupipano.weebly.com/uploads/1/3/4/5/134598946/roditudaz_jasegidupuka_madabigaxujufi_gupekove.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410459/normal_60038f2360585.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/itRZjgZ/preschool_learning_fun.pdfIn PDF document text
    • https://cdn.sqhk.co/wediximewoza/MByjghj/12030632160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_60224ce7e3d01.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugubobo/d1jjjjA/download_dragon_ball_z_super_goku_battle_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_600b3353e8f64.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/nuvukivaxiren/66213645582.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/addictive_drums_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/toragakexodonoxurebit.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_off0000d255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD255 5484 bytes
SHA-256: 887e0cede17179e3e9a9452d893893b18f86adefd3639621311c5b806c1b106d
font_01_sfnt_off0000e4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 10108 bytes
SHA-256: 93110fc2a3238c3efe99496dd2be04a1d9e1a5bf1843c5fd048f2b271d188dad

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