Malicious PDF — malware analysis report

Static analysis result for SHA-256 22790c1a10879dee…

MALICIOUS

PDF

84.1 KB Created: 2021-04-01 22:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 281ea33c5a9e5af64270ab1e2f405438 SHA-1: 795309d3e1dc8c404878328d313f36b05a40ed89 SHA-256: 22790c1a10879dee6ff83fffb2bb32dc4046d620e9fa3a53a09377a40cb108bc
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. One prominent URL, 'https://seumenha.ru/strik?utm_term=glamglow+bubble+sheet+mask+%25D0%25BE%25D1%2582%25D0%25B7%25D1%258B%25D0%25B2%25D1%258B', appears to be part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=glamglow+bubble+sheet+mask+%25D0%25BE%25D1%2582%25D0%25B7%25D1%258B%25D0%25B2%25D1%258B PDF link annotation
    • http://50offshop.pro/kefaritoxafuxiwumelasuphj6.pdfIn PDF document text
    • https://kedaweva.weebly.com/uploads/1/3/4/8/134895813/jevub.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/gosaredanaji_mokotad.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/jejaKgg/funny_climber_picture.pdfIn PDF document text
    • https://notozovurex.weebly.com/uploads/1/3/2/8/132814393/8626625.pdfIn PDF document text
    • http://iglivesupportteam.com/kijuge8n520.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/jhpwhfP/6879796804.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/lazarillo_de_tormes_castellano_antiguo.pdfIn PDF document text
    • https://cdn.sqhk.co/luridixajix/dNjcjgb/physics_dictionary_application.pdfIn PDF document text
    • https://nukanomipixi.weebly.com/uploads/1/3/2/7/132740264/lizuzatogitibemavu.pdfIn PDF document text
    • https://cdn.sqhk.co/keviwebewuta/jagjhfg/pepetowudisagevamiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_62d1ec6658d14db3b3319e7210ddc5d4.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_cbd2e1c723a14ffaa6bef0bd2406a7f6.pdf?index=trueIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_fbb6ef3b1d57420c8b41c465cf73a657.pdf?index=trueIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_7e0d4ada7391477bba81e6655a1fef07.pdf?index=trueIn PDF document text
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_ab6dc2d35f264613928488697a617cc6.pdf?index=trueIn PDF document text
    • http://vovojoj.atwebpages.com/15278143803.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_dcb290198ec245edb998776f5f62b631.pdf?index=trueIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_3f034232d4454b16a90af075385756a4.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_1dd127ae1ebb4522b7cc99af17e2dca1.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 5900 bytes
SHA-256: 7d62588deb52efa63dfc4148d3d0b6240b6929d21e3115969244d4bb5f3c803f
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 16000 bytes
SHA-256: e5a17118b12fb2e6a33bf4a999781e87a556a883f769b3e219028cd6cda81abb
font_02_sfnt_off00012c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4F 16060 bytes
SHA-256: 245b106bafb5f7b974d9b536baca1fd5b70b5a56c91d3379d5016bbcc58c4bac