Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e8ba6813826db4…

MALICIOUS

PDF

71.8 KB Created: 2021-03-24 02:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c08113bc468a90cf54d519aa803badcb SHA-1: 0dec9d99098f527005508c0daafc5506a94bc379 SHA-256: 47e8ba6813826db464f461b358c3488842f7bd24c060b29beeda4f87213056d4
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=ps+i+still+love+you+trailer+1 PDF link annotation
    • https://cdn.sqhk.co/fosojatesog/iuB84ih/four_in_a_row_math_game.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/addition_table_1_100.pdfIn PDF document text
    • http://easybranding.org/english_grammar_checker_onlineb6azn.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/a0VAjsu/3642954292.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdfIn PDF document text
    • https://cdn.sqhk.co/tonukabonuwe/Kgijbgd/rovivozafexek.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/basic_terminologies_of_accounting.pdfIn PDF document text
    • https://zapeledi.weebly.com/uploads/1/3/5/3/135314532/lapaz-ziroderodexu.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/fernando_alonso_crash_indy.pdfIn PDF document text
    • https://vivexizakodol.weebly.com/uploads/1/3/1/4/131483194/1860217.pdfIn PDF document text
    • https://raligeledow.weebly.com/uploads/1/3/4/8/134893256/e62fe32.pdfIn PDF document text
    • http://leftoutclub.com/jefutemagekunovikulunezugkcpfn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_7a3f11d96d5b40f3b2b4cf8b9f710c04.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_e2c025a7ee224edda44bec0277d99b04.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/23796744866.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_e73c6c065dfe41e9868a58af760e4339.pdf?index=trueIn PDF document text
    • http://riledabetime.myartsonline.com/gejogebexabawu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/metitavularojazuliv.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/81368858113.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_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 4892 bytes
SHA-256: 86cb17da657aa8a57ea1529ae7df39eb9b960e3676769c031d7a975617b90362
font_01_sfnt_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 10912 bytes
SHA-256: 0f1521347ab779ebb2557d43ed76b10e924b02648125c5174ef9422ab54a7ff3

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