Malicious PDF — malware analysis report

Static analysis result for SHA-256 249067362c24abe6…

MALICIOUS

PDF

77.0 KB Created: 2021-03-16 08:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1c57e3034ed2545b05885efc13ef80cc SHA-1: 894fedb7081c136000050b05995fc8218d45177f SHA-256: 249067362c24abe62ac5481e038ab4aec1615762a3653f2c75923abf3615dc7c
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://seumenha.ru/123?utm_term=hackett+jacket+size+guide PDF link annotation
    • http://fejukoturig.medianewsonline.com/55854898856.pdfIn PDF document text
    • http://tifiwijewek.iblogger.org/96396718632.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/vopowekofolekeg.pdfIn PDF document text
    • http://xopeximitefun.iblogger.org/cryptography_and_network_security_questions_and_answers.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/xofabusadivup-febadod-kibenaxix-petunapixob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://durenifujogax.myartsonline.com/taziguvadifuvojofuronaxe.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/76373926195.pdfIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_864ecc3287f14c61b9fb9f8849954bcd.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_cd960fe5519b48448715714466429b6d.pdf?index=trueIn PDF document text
    • http://pozijawikubinun.myartsonline.com/jomejod.pdfIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_79868bbbe5684d699f7aa51d0761e536.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_d53e2082ce0d4b40b72722a17d0aaf8a.pdf?index=trueIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_589e6132c5964d4395e5ba65a181dbed.pdf?index=trueIn PDF document text
    • http://juzuwewu.rf.gd/obsessive_compulsive_personality_disorder_test.pdfIn PDF document text
    • http://janaxoz.epizy.com/28365528492.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/zajozugazejodagugi.pdfIn PDF document text
    • http://fimekozuf.rf.gd/66649314851.pdfIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_3c8c6cc7c44e4e3dac74a9ee4ed8291a.pdf?index=trueIn PDF document text
    • https://0ed30ddb-3df1-4505-9e4e-3e87fc6d20ea.filesusr.com/ugd/f043c1_c20c299dc2274be28ff25dea56967976.pdf?index=trueIn 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_off0000ea89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 5132 bytes
SHA-256: 62332eb8de845f31b0137c87c464be67852d53c0555057b5b35631300db69b37
font_01_sfnt_off0000fc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1F 14752 bytes
SHA-256: a289f5d1f57e48fbd57d08d22476c6932bbfe1920da8f1f908d1ae8e152dc831

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