Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c49bbdfcaa89fa…

MALICIOUS

PDF

74.9 KB Created: 2021-02-24 14:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ee0d00165c81fb47ef2a1b641b76d21 SHA-1: d2d63b895a716541c45206f5c0790849d48df5ee SHA-256: d0c49bbdfcaa89faba0a0ccd51feaeb5ae8b2fdd176ac082244f2895d4147b77
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure related to song lyrics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

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://baarspo.ru/award?keyword=someone+like+you+adele+lyrics+and+chords PDF link annotation
    • https://visosoduvevup.weebly.com/uploads/1/3/4/2/134234588/3320903.pdfIn PDF document text
    • https://tewamuwomipatus.weebly.com/uploads/1/3/0/9/130969874/2971127.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/viwekosef-dejel.pdfIn PDF document text
    • https://jozisanolotodix.weebly.com/uploads/1/3/0/9/130969335/betuvinekejavu.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/xanisuzepokatokix.pdfIn PDF document text
    • https://cdn.sqhk.co/deguxikezu/yBBgijc/flurry_animal_crossing_personality.pdfIn PDF document text
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/494cac5012302.pdfIn PDF document text
    • https://jetorijeroxu.weebly.com/uploads/1/3/4/6/134693882/6f9b268ed6ae630.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/ijahdig/novewevoxubibezikov.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/3d023f1bebac.pdfIn PDF document text
    • https://rarinuda.weebly.com/uploads/1/3/5/3/135349313/kenopaluroben.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/jaNgfjj/police_chase_houston_beltway_8.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/DhbKhix/craftsman_truck_tool_box_accessories.pdfIn PDF document text
    • https://vatifogogunubit.weebly.com/uploads/1/3/4/7/134725392/abd753f75.pdfIn PDF document text
    • https://kuxapularutamux.weebly.com/uploads/1/3/5/9/135984678/ratapujaxejoje-tapar.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/pozokimepe/payment_authorization_form_china_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/ejemplo_de_introduccion_con_normas_apa.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_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5448 bytes
SHA-256: 383e99a06c841af9de872889c01f60f28fdc9e5694dee031ac9b14c5de608de3
font_01_sfnt_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 10240 bytes
SHA-256: 6193ee5ed268104abeeabae78b27d6d77458169faea3a01d6121ec41c88ac9c0

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