Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1037ecfe5dc988…

MALICIOUS

PDF

80.3 KB Created: 2021-04-29 10:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e40e0abc791f7fdfa608992a1821874 SHA-1: deff8c50643861e347ea3109485b8fa1948628d9 SHA-256: 2d1037ecfe5dc98871f77b69106e33188d022e5c93d3b2eec80df522fbdac18f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The embedded URLs point to potentially malicious domains, indicating an attempt to redirect users to harmful content. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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-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://fokemale.ru/strik?utm_term=boyds+remington+700+stock+review
    • https://cdn.sqhk.co/gasupewu/J6jeFPE/xelotemafasuwed.pdf
    • https://cdn.sqhk.co/lotidonita/jGOGbjk/impossible_war_tanks_blitz_tank_games_unblocked.pdf
    • https://cdn.sqhk.co/galemojubemo/gdehecZ/20360834922.pdf
    • https://cdn.sqhk.co/gubujurit/jdHGPPe/the_crossing_at_juban_apartments_denham_springs_la.pdf
    • https://cdn.sqhk.co/miviterul/ea5idhh/21489183146.pdf
    • https://cdn.sqhk.co/bovefonot/jdRheby/26465584538.pdf
    • https://cdn.sqhk.co/javomekoru/bigo5Uf/advanced_spectrum_analyzer_pro_windows.pdf
    • https://cdn.sqhk.co/petebeki/bgeia4j/rivixuduzabanivavok.pdf
    • https://cdn.sqhk.co/tasokuxu/0wjd1jg/38090328455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_14b36a3ca51843c0a4e7301559ea7c6d.pdf?index=true
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_02d10385b6ae416baf224d2e9d371853.pdf?index=true
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_020f7ac6b1bb4a58b89763ff9f6e6a74.pdf?index=true
    • https://uploads.strikinglycdn.com/files/77c92a09-1595-476a-a642-65c62835505b/chariots_of_the_gods_synopsis.pdf
    • https://b3159766-6c8b-4733-a97d-e59ef6783693.filesusr.com/ugd/21851e_913cf14f750b405c830351125ee1a0f4.pdf?index=true
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_2b3e177b28354ddab1d0b7bd0417246a.pdf?index=true
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_55c156635a7d4a26b77a071e8374fd0d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ab04f8a-bbb4-43ab-afdc-8b08d5826d11/cateye_velo_wireless_reset_odometer.pdf
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_ee4e0163a1524fc3a46db9f7c2d9d36f.pdf?index=true
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_008afaa2645d4dbd9ab619882f9a0fc1.pdf?index=true
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_119a4199911b4531a1e3c5d5391a9efa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b0aa2d0f-1908-43ef-9966-ca0b5bee4d27/5574400884.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_15ebd6b054c549519d0e21db88165761.pdf?index=true
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_6b9c98d351ef4e3aa2406eb1564a2b94.pdf?index=true
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_9aae532037b94a1d9de45788a14d6d92.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f8a32b54-23f1-4e1c-b01f-b62677a442c7/71664736038.pdf
    • https://uploads.strikinglycdn.com/files/fbe557e8-bc45-432a-8f26-be87aaae7384/63354190249.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_off0000f924.bin
92a013e6afd96b94b65ce39b242f59ced1cce49fc0480ea9453257b483b1824b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 5608 bytes
font_01_sfnt_off00010c51.bin
00684e459d460319dfafab0476032b48d1b553cc4824aba7ba4f96ee97fb8d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 11512 bytes

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