Malicious PDF — malware analysis report

Static analysis result for SHA-256 743dd297af7ce826…

MALICIOUS

PDF

142.6 KB Created: 2021-04-26 12:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81b97dfbb7f6782087c5bbf434e1e06d SHA-1: d597fb9b81f9809e6a3ece5cfa6a6580ace2528f SHA-256: 743dd297af7ce8261d9b1f0f69df7f911252953e6f5c2feb1725c2d3c26fffb9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external links, https://kuzutuzo.ru/strik?utm_term=the+secret+life+of+bees+summary+chapter+4, is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=the+secret+life+of+bees+summary+chapter+4
    • https://cdn.sqhk.co/liweruruzed/UjfhdRV/powerdirector_pro_apk_free_2019.pdf
    • https://cdn.sqhk.co/virapazetif/ijjBVig/fatetuwaviregunonixeve.pdf
    • https://cdn-cms.f-static.net/uploads/4413008/normal_603f9ed43cf80.pdf
    • https://static.s123-cdn-static.com/uploads/4493867/normal_5feba2b7e02a2.pdf
    • https://nubapatis.weebly.com/uploads/1/3/4/0/134095887/menapulo-fegom-sisulusawe-wimet.pdf
    • https://cdn-cms.f-static.net/uploads/4420037/normal_603ccad314ba0.pdf
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/f5b0262c3.pdf
    • https://cdn.sqhk.co/zetanitanedo/9gchdih/vamugafugifiwisumewuw.pdf
    • https://cdn-cms.f-static.net/uploads/4417659/normal_6026ee6953a9a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://67acb2b6-3e42-4063-a073-371cb527a15d.filesusr.com/ugd/a81d48_a5b6753b6e9e4272957085fc65d915d3.pdf?index=true
    • https://s3.amazonaws.com/jefazaxal/vodifuxumebololegaweroki.pdf
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_4c742963d38d47d4b533d1137355095b.pdf?index=true
    • http://visunizuze.epizy.com/double_entry_bookkeeping_basics.pdf
    • https://s3.amazonaws.com/vanatul/zudegaral.pdf
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_75878d956b8e46f697794ae8c042046b.pdf?index=true
    • http://ximedamolaxeve.epizy.com/murejorudejazidu.pdf
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_f41488b189f94c6f99ecdf910550e910.pdf?index=true
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_e0d94968702043168ec79b9c05c41cf9.pdf?index=true
    • https://s3.amazonaws.com/sinamozagemoger/91671990139.pdf
    • http://nexisaxilesa.rf.gd/99949811620.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dd98.bin
3ca48eaadf85f96ce358a277d88889a1ea8ebe46c5cfc2af7c90931da1faf821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD98 5536 bytes
font_01_sfnt_off0001f049.bin
c343bab7b9e4c4ce2ef3fe63f59e708c769b67dd4348b508eed4b7de457a68d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F049 11264 bytes
font_02_sfnt_off000216da.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x216DA 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.