Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee23dc06bfe8a85…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 02:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cddddef0f75e632d3a72b4a15681e57a SHA-1: 938683d36fc8ce66b8713fb6d3ed277b964b6c97 SHA-256: 3ee23dc06bfe8a8525047403bf17e8470d4abf3002d01111d5d69cf492e50301
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on file-sharing services, suggesting a link farm or redirection mechanism. The primary URL, 'https://seumenha.ru/strik?utm_term=kirby+sentria+2+vacuum+price+new', is likely used to direct users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://seumenha.ru/strik?utm_term=kirby+sentria+2+vacuum+price+new
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/4309964.pdf
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5fc693860b6ce.pdf
    • https://mubuwevuli.weebly.com/uploads/1/3/4/5/134528176/4613d89e.pdf
    • https://cdn-cms.f-static.net/uploads/4482849/normal_604b567a19401.pdf
    • https://kupajozowujuz.weebly.com/uploads/1/3/4/8/134881722/4244763.pdf
    • http://bbflowers.net/31002081128ka0n5.pdf
    • https://cdn-cms.f-static.net/uploads/4477155/normal_5fd29cff8996f.pdf
    • http://dezlice.ru/buzudakapavotasibesabipil2a04t.pdf
    • https://cdn.sqhk.co/mogizufofuj/haFkqtc/install_mod_menu_gta_5_xbox_360.pdf
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/7a0121.pdf
    • https://cdn.sqhk.co/nupopobax/5jjjOER/santorini_ballito_property_for_sale.pdf
    • https://static.s123-cdn-static.com/uploads/4417312/normal_5ff27e579c157.pdf
    • https://cdn.sqhk.co/guvelebul/jeOgfJT/vex_2020_online_challenges.pdf
    • https://cdn.sqhk.co/modajili/EBuhhh0/nenuwaxasupujore.pdf
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5ff034338ef8d.pdf
    • http://vandify.com/wavelet_transform_image_processing_python0dxz5.pdf
    • https://cdn-cms.f-static.net/uploads/4408319/normal_602ad3c01bd0d.pdf
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5fce226f31631.pdf
    • https://cdn.sqhk.co/jatobeguji/a4ia7hf/bamuzu.pdf
    • https://cdn-cms.f-static.net/uploads/4493881/normal_60240a6f04641.pdf
    • http://hiziryigit.online/lipoxugutobevowitbo09m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_470b4564c59841c09d282d5188a4066b.pdf?index=true
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_e0b1287161f245cbac7cf34e91712451.pdf?index=true
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_029903b33480484ba5af62370ce6b1e5.pdf?index=true
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_3c76f559b5064033bc7b743b8a6add82.pdf?index=true
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_52eda493a6cc4c79af4f379435a25197.pdf?index=true
    • 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_off0000f57e.bin
ee3075400a7702b64716ad6f104cd8c89062d2200c513d6794d2c98ca04f82a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 5540 bytes
font_01_sfnt_off0001085a.bin
6d3c4074f91c047f63d2afd78384e73e9d0a6d24e69ca9701993711e9c9854bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 10524 bytes

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