Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb1412350415b2a…

MALICIOUS

PDF

96.8 KB Created: 2021-04-06 08:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7ed9e9a4bd4c424f99f37211aec86c4e SHA-1: 8fc636f91a2db7257311d3758d126206a34e6286 SHA-256: beb1412350415b2ac79bd1ccd21c466602e30c2f463d21007619b87b8cf98896
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 0.9997

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://crophysi.ru/123?utm_term=core+java+test+papers+pdf PDF link annotation
    • http://powojisanenod.iblogger.org/wordpress_missing_the_mysql_extension.pdfIn PDF document text
    • https://ninozaji.weebly.com/uploads/1/3/4/6/134690112/potos.pdfIn PDF document text
    • https://jamojibo.weebly.com/uploads/1/3/5/3/135349767/b06b1f972.pdfIn PDF document text
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/6a0c26.pdfIn PDF document text
    • https://najunewuzerus.weebly.com/uploads/1/3/1/4/131408250/robobapurimur.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/2968455.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/bubak.pdfIn PDF document text
    • https://kozenuxifojani.weebly.com/uploads/1/3/4/6/134665776/97014827.pdfIn PDF document text
    • https://sagurofabe.weebly.com/uploads/1/3/4/6/134686650/6499288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novosumagib.epizy.com/types_of_testing_in_software_engineering.pdfIn PDF document text
    • http://zezatavaveb.epizy.com/wiropikeguxamu.pdfIn PDF document text
    • http://mibiravotawuga.epizy.com/38799503854.pdfIn PDF document text
    • http://xinugut.epizy.com/add_blank_page_in_file.pdfIn PDF document text
    • http://mewudupite.epizy.com/sanaze.pdfIn PDF document text
    • https://c20a02f1-eded-46de-afbf-2d7328e03b26.filesusr.com/ugd/c6fd25_40d913ead5c442aeb7b1258851079872.pdf?index=trueIn PDF document text
    • http://zepalosolup.epizy.com/xonimunezeruvusitob.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_0384c92ec7f1416d9fb04c086a7809f7.pdf?index=trueIn PDF document text
    • http://gumavefuve.rf.gd/histologie_tissu_musculaire.pdfIn PDF document text
    • http://sexikiti.epizy.com/30812260937.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_74c9b6137a5f45b4b1a9cbc85d119797.pdf?index=trueIn PDF document text
    • http://fapisab.rf.gd/brett_young_like_i_loved_you.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_off00013c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C40 5044 bytes
SHA-256: 72a5327bd148a4c209bc739b98ed3846ae79ea534da8bb13c5e8a93f5304ad4f
font_01_sfnt_off00014d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7B 11756 bytes
SHA-256: d5bc35abc488eb00dd1d6380f98bf189cc94fcb100fed1cc55dd56f8106d2e44

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