Malicious PDF — malware analysis report

Static analysis result for SHA-256 6025503519040216…

MALICIOUS

PDF

99.6 KB Created: 2021-03-08 12:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d931b4611773de5675062467969a08bc SHA-1: edf84975f670953dd77a1db2bce5a4aa94d5be05 SHA-256: 6025503519040216b7caac33cdc6d61eb93ff5f5d1fbd5c13155e4d19bcbd200
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ponafet.ru/123?utm_term=parquet+file+format+snowflake', is particularly suspicious and likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://ponafet.ru/123?utm_term=parquet+file+format+snowflake
    • https://cdn.sqhk.co/bipozipo/4Cjjjhh/zubopoxijekuk.pdf
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5ff10ad19f2f9.pdf
    • https://cdn.sqhk.co/wedowetaso/gijcjcL/nopazesosanuvamuzezeta.pdf
    • https://cdn-cms.f-static.net/uploads/4402712/normal_60370b54b1587.pdf
    • https://cdn.sqhk.co/dikizumi/kgg517Y/tips_for_buying_and_selling_bitcoin.pdf
    • https://cdn.sqhk.co/puxedimuwo/iigikgE/rovebekinirupewazigan.pdf
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fe2ec637724a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_af3d9603e56b4d3c8be7595d147ee943.pdf?index=true
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_2e5ad2bf44a84d74a0b8ab2c56fcde10.pdf?index=true
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_71c2057e86924c7d917f230d4c30e280.pdf?index=true
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_d3d5f51f46b746aea91667bc61ecb767.pdf?index=true
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_8389b5ffb754425db85d6c50ff282cd7.pdf?index=true
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_535b0016e1ad4758a84ead3102decdb8.pdf?index=true
    • http://lunujebof.rf.gd/does_dunkin_donuts_flavor_shots_have_sugar.pdf
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_f7a1a7fca0a74cd7ae8aa6c378773472.pdf?index=true
    • http://xepalufozakot.epizy.com/piduxovagopalu.pdf
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_7367c343a7ee4dbd8b21f689a95291a8.pdf?index=true
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_563f627d407c4738a7b6658766a6f4e5.pdf?index=true
    • http://medowopevafosi.rf.gd/abhimanyudu_villain_background_music.pdf
    • http://fobiwuna.epizy.com/b612_selfiegenic_camera_app.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_off00013e44.bin
6dda8bfaf1dabd44e9086cebca006897d59580cff04693bf396ebfe0981c5d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E44 5196 bytes
font_01_sfnt_off00014ff3.bin
4d6b67572925dec73da9a5930ec9af2d22aff54f44402dc1c57fd9192ce9bfc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF3 13852 bytes

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