Malicious PDF — malware analysis report

Static analysis result for SHA-256 8689e5f5b61be80a…

MALICIOUS

PDF

69.9 KB Created: 2021-04-01 07:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64403735916e5408f15fab76a2aa378f SHA-1: cf90c022b7dddf64dfaccd46ef482dac516a1d58 SHA-256: 8689e5f5b61be80a982c7d5f55356fb2f29d354ed6e33a5681860d5aee31937b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous external URIs, with a notable one being https://bologen.ru/123?utm_term=cushman+and+wakefield+austin+office+market+report, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a market report, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=cushman+and+wakefield+austin+office+market+report
    • https://cdn.sqhk.co/peluxisomex/ge78ibd/nba_2k20_myteam_lineup_tips.pdf
    • http://j3vnci4.xyz/19237862709t3io2.pdf
    • http://fastcreditcheck.info/excel_find_duplicate_in_another_sheet7yids.pdf
    • http://caterm.ru/27678259546jw0vj.pdf
    • https://cdn.sqhk.co/bepigulusibe/OKNbHgg/freeway_insurance_reviews_bbb.pdf
    • http://evatopshop.xyz/tudomozizezolilofiwidevv1yt.pdf
    • https://cdn.sqhk.co/rakujolo/1ibTdNB/chess_royale_play_online_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/62fef531-1fd2-4376-b556-e1095414541d/muger.pdf
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_dac57525794240deae1acfe109c8878d.pdf?index=true
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_cf9382152e0a4c93aa440787c747d85a.pdf?index=true
    • https://s3.amazonaws.com/janodojivi/compound_sentence_worksheet_grade_6.pdf
    • https://uploads.strikinglycdn.com/files/f0e7a0aa-4cba-4cc7-9091-ae99249a0ad3/98694080446.pdf
    • https://uploads.strikinglycdn.com/files/f4611ce1-2f78-4cac-a4cb-e26d77df6081/88709465933.pdf
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_1d8e06155dda4a769818e0a6edd2a078.pdf?index=true
    • https://b993c520-4fc9-488d-8dda-35d8b3dc2713.filesusr.com/ugd/6f5492_423d88b763ac43d38c221adaf805c46a.pdf?index=true
    • https://s3.amazonaws.com/gifojuxaxeva/bluestacks_1_for_windows_8._1.pdf
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_c590b36b561c486f93f549b630b7ada1.pdf?index=true
    • https://s3.amazonaws.com/xamibebulosaxug/gixopejuriw.pdf
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_0f5969bab33d448a9e6a77a9fd229a5b.pdf?index=true
    • https://s3.amazonaws.com/napejaxosinages/dudobipojinejixowaxeb.pdf
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_b87f00dec8384f5c840a9aaba839a614.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_off0000d003.bin
6b24f2294cb1c1cba3141d60f24e2e15bc74ad19a20a77c9c2999cdf1339fe68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 5456 bytes
font_01_sfnt_off0000e275.bin
857da55c53b8953f99ee943ff3e7b49dff1df5ca6fad52223d5cb71b32225b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 11672 bytes

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