Malicious PDF — malware analysis report

Static analysis result for SHA-256 f002fe9c7d81d5ad…

MALICIOUS

PDF

87.6 KB Created: 2021-02-20 05:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c839685d2bd99bbcadced609fdc65f29 SHA-1: 5406634f8b8d5f83320897174125b64370242478 SHA-256: f002fe9c7d81d5ad7c610f445a633f2d8395c3e41e42fd56cdf9d3f7fae4c37a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially leveraging PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=lock+apk+pro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460072/normal_602d801ce12be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_5ff5e7ea0c27a.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/4539422.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/0f0128cb8810c.pdfIn PDF document text
    • https://wugexufaferefe.weebly.com/uploads/1/3/0/7/130776446/pufisi-puwerepuga.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/d226687859e9033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478422/normal_5ffe73b670367.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/gfXbgh7/30683823091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383918/normal_6008eae535f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5fe6c60231342.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/d26a3cd24.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/0wgehhc/how_to_make_stranger_things_your_ringtone.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/hJSihf2/xatipikival.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449405/normal_5fe06091d3950.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/4gjmThz/rom_installer_without_root.pdfIn PDF document text
    • https://febosefukeja.weebly.com/uploads/1/3/5/3/135324858/lavuvupaket_mixumutemetefo.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/7ebe40be1efc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_60281f08b5a0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabafurulevu.epizy.com/nubov.pdfIn PDF document text
    • http://puzujudu.rf.gd/badinerie_bach.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011ee6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11EE6 28268 bytes
SHA-256: 982971480091016b36be21399fd46eb204caf89c55afd349f98bc1d9c666cf74
font_00_sfnt_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 4720 bytes
SHA-256: b49dfff45e27988758325eed2e4a2aa896bfe47e4c0f9c9af4e5e349312ea85b
font_01_sfnt_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 3024 bytes
SHA-256: f271277bc92c8ec255f016eb89af31946ace6cee13b85d2ca72bafc089855a25
font_02_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 11632 bytes
SHA-256: bb1c2ebe39e7681b1a541f460abacaa60733d61e421519ec4dedc68b0871c386

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