Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b24cb0532c1f22…

MALICIOUS

PDF

73.4 KB Created: 2021-04-05 10:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d97815c0aca0b224ad564343077b2de4 SHA-1: ea77bb153558ae50141dc7c40906044ee6e86ea8 SHA-256: c7b24cb0532c1f220180aec26c1ac70cc41a0a973993f30d13e2f279b66e7da9
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for a link farm containing 30 external PDF links. The document body, though heavily obfuscated, suggests a lure related to 'Bible apologetics pdf'. The presence of numerous external links, many pointing to PDF files hosted on file-sharing or personal domains, indicates a likely attempt to redirect users to malicious content or phishing sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/award?keyword=bible+apologetics+pdf
    • https://zoxexakaxikat.weebly.com/uploads/1/3/0/7/130739387/7642908.pdf
    • https://cdn-cms.f-static.net/uploads/4500904/normal_601a48ce3ecf9.pdf
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/kojiwolowobe.pdf
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5ff104e187281.pdf
    • https://cdn.sqhk.co/xidatelo/1Ujjic4/ledibubaralasupimetuf.pdf
    • http://bezinawevudo.22web.org/28467749395.pdf
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/44335d9538c82b1.pdf
    • https://saritubix.weebly.com/uploads/1/3/4/5/134507132/lopetetiso_xotizi_jadazi_vorigufokup.pdf
    • https://cdn-cms.f-static.net/uploads/4392651/normal_6032506577fd7.pdf
    • https://cdn.sqhk.co/nexetifosam/tmFOEib/ted_talks_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4386607/normal_603a5050b1915.pdf
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/rasusopib.pdf
    • https://cdn.sqhk.co/gukisafuw/hjfu7ii/kawarakutuvojalogek.pdf
    • http://lolukibokon.iblogger.org/divabivunizor.pdf
    • https://cdn.sqhk.co/tevunufoba/2BMhjib/74356386973.pdf
    • https://static.s123-cdn-static.com/uploads/4369153/normal_5ff78a1a23a79.pdf
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/8467783.pdf
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/db96a3e8a2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuwofexuguxu.epizy.com/health_canada_adverse_drug_reaction_reporting.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03f.bin
aed4da774e2ec70c6016497dae4b2f99354bed7e52303736cff776a340e2c1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 5416 bytes
font_01_sfnt_off0000f2bd.bin
95e2fc66fc6f1f959905fe2cb5166d4f5d6b5bac052689a19e27fa7edeb714ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 11176 bytes

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