Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7f8e78bd06a2ec…

MALICIOUS

PDF

63.8 KB Created: 2020-12-28 18:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5119902df890d272a798c60cef318a84 SHA-1: 73aa3726481ddc5f7ec94604e3dca0a38d3b10c8 SHA-256: 0d7f8e78bd06a2ec90a15c520788155e524f25bc2dbf4eb4b6a8740839b70eb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are likely part of a link farm designed to obscure the true destination. The primary external URI points to 'https://trafffi.ru/strik', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text related to a game, likely a pretext to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/strik?utm_term=call+of+sniper+mountain+shooting+3d PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416669/normal_5fa15e1ced592.pdfIn PDF document text
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/5300382.pdfIn PDF document text
    • https://rogumine.weebly.com/uploads/1/3/4/4/134448770/nupofawetuligu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f01ffbf-fe30-4244-89ba-42995d55b31b/2044566232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefabfd9-ea37-45c1-8bb0-446b1bb0f13d/yahoo_mail_read_receipt_notification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d563f536-aace-4dac-9bc3-e136c66d6166/how_to_make_a_water_breathing_potion_in_terraria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009657e9-4e7e-4111-b591-0421f8b02dd7/conquest_of_the_american_spy_den.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d822599-9834-4704-be68-9c099816db17/fitbit.com_setup_manual_alta.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/komukelivanogaxuxevixox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b980277-81b8-4f99-a703-0ec77f3e66ae/practice_counting_atoms_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/difference_between_addition_and_condensation_polymerization.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/airtel_recharge_app.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/stoke_city_fc_former_players.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3E 5524 bytes
SHA-256: ce7a886b1e679a3b59f785b6e8e16c04e466e631ffec25a4341812457ea65f46
font_01_sfnt_off0000d0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E1 9860 bytes
SHA-256: 4153fc9f5f000402e1f6c4284376b9b5051edb146a11eeb94b102dacf2413147

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