Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a49d8500b2ad2…

MALICIOUS

PDF

76.4 KB Created: 2021-04-13 13:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5522adf69fb6e3e0a06c7fa8d988a4bd SHA-1: d263d056d1da0ee8e10143aff62a4020214b70bc SHA-256: 8e3a49d8500b2ad2d8ab61450af0992c1942cd1b2991960dbcb5aee212877c4a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to 'zajinet.ru', likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=requirements+to+become+a+public+relations+director
    • https://cdn-cms.f-static.net/uploads/4387061/normal_604a1bb6b9d04.pdf
    • http://naliputa.mywebcommunity.org/brave_new_world_revisited_aldous_huxley.pdf
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/dajakizavowevur.pdf
    • https://cdn.sqhk.co/pixazizaze/jhjbvhg/wakasutajowokokulivuti.pdf
    • https://lafuxekezijunu.weebly.com/uploads/1/3/1/4/131406487/6559555.pdf
    • https://cdn.sqhk.co/vefomatakin/chbjdjd/kikebagatigipakur.pdf
    • https://cdn-cms.f-static.net/uploads/4390071/normal_606c178f864ac.pdf
    • https://cdn-cms.f-static.net/uploads/4454965/normal_5fe6a6cb8b49b.pdf
    • https://cdn.sqhk.co/nawovoso/tlznYje/63631836616.pdf
    • https://static.s123-cdn-static.com/uploads/4455639/normal_5ffdf912e43e5.pdf
    • https://cdn.sqhk.co/ranemagesoga/ighhfji/marvelous_meaning_in_telugu.pdf
    • https://static.s123-cdn-static.com/uploads/4389603/normal_5ff56986e6f07.pdf
    • http://torixobo.mypressonline.com/caderno_de_anotaes_personalizado.pdf
    • https://cdn-cms.f-static.net/uploads/4455387/normal_602f30b1a3f6c.pdf
    • https://lelibajoterudu.weebly.com/uploads/1/3/4/0/134042739/2e4893.pdf
    • https://static.s123-cdn-static.com/uploads/4383327/normal_5ff116fcbdaa3.pdf
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5fda2317e8df0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3664b010-083d-4b2a-98fd-81fa7fa6a300/bixobelejagakol.pdf
    • https://uploads.strikinglycdn.com/files/8ea9926c-79d7-4af3-b243-da4b6e3db5c7/jomuvuverurejemima.pdf
    • https://uploads.strikinglycdn.com/files/03929d0a-603b-4c62-9767-6ad83c48b949/4852518741.pdf
    • https://uploads.strikinglycdn.com/files/5e3a5b12-2019-4aa5-8c43-cd1ffe4a3eab/the_crown_season_4_episode_1_fact_check.pdf
    • https://uploads.strikinglycdn.com/files/e3bba064-f56b-43eb-875f-b184084c1f03/fisher_paykel_double_drawer_dishwasher_error_code_f1.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_off0000ec17.bin
4625c2c39fca47fa6d23cb194385e116a23a18507a5849167b3749eea99ce039		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 5492 bytes
font_01_sfnt_off0000fea8.bin
c96e59669debb21b6d0febf95962475e655e98e58d063bece4492b5a10181300		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 11148 bytes

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