Malicious PDF — malware analysis report

Static analysis result for SHA-256 746cee5235530245…

MALICIOUS

PDF

79.6 KB Created: 2021-05-07 18:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9854f4757b6b5a00d5e822e95f92f393 SHA-1: d53e1606e841a95f4b1eaeb32c4bdad7232c0853 SHA-256: 746cee5235530245cdddda8579b1d5f200956af72a835a15599c73daad2d9b50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM' which indicates a large number of external links, with the primary example being http://fuxunowelujuxa.atwebpages.com/janigisevavufeliveve.pdf. The document body, though heavily obfuscated, contains text related to online poker and a URL that appears to be part of a phishing or scam campaign. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/strik?utm_term=can+you+bet+money+online+poker
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/nowomaxodobez.pdf
    • https://xakijugikirire.weebly.com/uploads/1/3/1/4/131437514/jevozabujunow.pdf
    • https://rawoxoduzipuk.weebly.com/uploads/1/3/2/3/132302868/a01907d10e93c75.pdf
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fd333b59fefe.pdf
    • https://cdn.sqhk.co/puberufibo/jfcJghf/52857116719.pdf
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/vazoxerobuza_jewixoteni_lomadoxox.pdf
    • https://nopogevoxipati.weebly.com/uploads/1/3/1/4/131410158/xivezaneju.pdf
    • https://cdn-cms.f-static.net/uploads/4382187/normal_60332c3962977.pdf
    • https://cdn-cms.f-static.net/uploads/4409239/normal_603aaaae67c45.pdf
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fd2eb264c972.pdf
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/84487.pdf
    • http://xovijezup.mywebcommunity.org/97412460247.pdf
    • https://fadabavawabup.weebly.com/uploads/1/3/4/0/134095990/ecce423f1486ce6.pdf
    • https://cdn.sqhk.co/jasojime/giWjgA1/33653829936.pdf
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/5675972.pdf
    • https://cdn.sqhk.co/muxuzoxipopa/Y2hcNgc/wexeloxalujesevusime.pdf
    • https://cdn.sqhk.co/sazipuvaxiv/Hb0jbbY/kaguj.pdf
    • https://static.s123-cdn-static.com/uploads/4470524/normal_5fe42f0466f67.pdf
    • https://tajerupabud.weebly.com/uploads/1/3/1/1/131164315/3125061.pdf
    • https://cdn-cms.f-static.net/uploads/4450350/normal_602be50039371.pdf
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fd60b9810752.pdf
    • https://cdn-cms.f-static.net/uploads/4445532/normal_606e1c0913606.pdf
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/totokajafisa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fuxunowelujuxa.atwebpages.com/janigisevavufeliveve.pdf
    • http://japamitafixe.myartsonline.com/the_anarchical_society_download.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_off0000fb13.bin
2eccfef4d1dbc2050c82032e4416c67e639ed9b3cf45a8f7dc9e67eb7b950dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 4996 bytes
font_01_sfnt_off00010c00.bin
49191f8a00a2b9155d92e9c41e2009840bc78ac2173143fcf7ada70f861fec6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 10692 bytes

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