Malicious PDF — malware analysis report

Static analysis result for SHA-256 98af49cf25d09a78…

MALICIOUS

PDF

69.1 KB Created: 2020-12-28 13:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f2bbbea0357a5a510c3356b0b7c659d5 SHA-1: dcf6c9160957d6c387ab9524e0a27f3aa51a887f SHA-256: 98af49cf25d09a783287aef45cb9a155708eb852c0c34310973f45b2fa6e5bf7
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The presence of a 'whammy all new press your luck online game' lure in the document body and associated URLs suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=whammy+all+new+press+your+luck+online+game PDF link annotation
    • https://cdn.sqhk.co/rewazexi/ijcOhcc/pentagon_naughty_boy_lyrics_translation.pdfIn PDF document text
    • https://vasukopedu.weebly.com/uploads/1/3/4/7/134709477/9014937.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/fjjghpt/bahamas_hurricane_video_youtube.pdfIn PDF document text
    • https://surugodinatuv.weebly.com/uploads/1/3/4/8/134861851/jesujo-forijewo-poposineriwisa.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/esGjghd/roboxumoxukojowuvif.pdfIn PDF document text
    • https://voluwunuzusiju.weebly.com/uploads/1/3/1/4/131452861/fisetexuzata-voteloxe.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/iahbije/software_data_cable_app_latest_version.pdfIn PDF document text
    • https://sosalikibagog.weebly.com/uploads/1/3/4/8/134856993/fosusofejipes-kulevudi.pdfIn PDF document text
    • https://cdn.sqhk.co/zigimovovu/jjhaGgc/29277810521.pdfIn PDF document text
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/5d84a167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20c3e0c-b12d-4e8c-a6d8-02f70ade7887/stamped_yellow_icon_pack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/kawom.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/kubejekufifawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b94b6f-bb1c-427b-a2b6-b6a6561c2270/leyenda_del_cadejo.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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 5620 bytes
SHA-256: a0013d7103d5a7b28cd89b3b2d73bbea99981655f6d508fd8c019051d220da8b
font_01_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 10112 bytes
SHA-256: d66280b202c800d56058bc0b5a1305b9f78dac79e9472e70e0a0a1bb87049866

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