Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5c289d18c51058…

MALICIOUS

PDF

78.3 KB Created: 2021-05-11 09:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ad41bcde4c5d470aa6e48a432c8ccb8f SHA-1: 596bfeb6c99bb6140fb1d204d747f85a229aeaf7 SHA-256: 8f5c289d18c51058cc442154a2237271316a08141ca6823a437c0e9e12c96ce9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=lol+patch+11.3+skins PDF link annotation
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/9941695.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/mabifi.pdfIn PDF document text
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/2952a3.pdfIn PDF document text
    • https://japutiluzot.weebly.com/uploads/1/3/5/9/135991977/091f8.pdfIn PDF document text
    • https://cdn.sqhk.co/murevexi/jlgi0jj/bomberman_game_for_android_mobile.pdfIn PDF document text
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/3f4be7917f3.pdfIn PDF document text
    • https://wesarifalonaba.weebly.com/uploads/1/3/5/9/135961423/5448984.pdfIn PDF document text
    • http://vkrowl.com/ny_stock_exchange_today_opendnwy7.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/jhjjFgf/86576151095.pdfIn PDF document text
    • http://frasqen.online/long_acrylic_nails_coffin_shapet2pbl.pdfIn PDF document text
    • https://maduzoxunixeg.weebly.com/uploads/1/3/0/7/130775653/toxobuzonesino_zegeta.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/6396079058uaqc9.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefugafa/AjavNJE/color_maze_amazing_3d_model.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/sagasib.pdfIn PDF document text
    • https://xakolino.weebly.com/uploads/1/3/1/4/131453712/4438669.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/037619965b58b0.pdfIn PDF document text
    • http://dimax-matrasy.ru/21016640391rpg8n.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/nojemi/call_me_by_your_name_movie_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/tirimoboji.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/34634112451.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 5180 bytes
SHA-256: d4b2fa6c9a40d438ab185410f4e09b6fa1dad4f261b14120b490804f5bb5b477
font_01_sfnt_off000103da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DA 11472 bytes
SHA-256: e17dfbd926cdd66ecf09ba271d8baf72a28440168a3424bff23a6f2112e6eeec

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