Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94731a6774a2c44…

MALICIOUS

PDF

71.3 KB Created: 2020-12-25 04:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ad2aec89929beaf67b6c831db5335272 SHA-1: 9a4fae407121ef08b4708e2f492ea6c6866fc0bd SHA-256: e94731a6774a2c4430dd9c5ee4bc3b8141606e1c7d747cee405197e3c1f154c8
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The document body, though heavily obfuscated, contains text related to game downloads, suggesting a lure to trick users into visiting these malicious sites. The presence of multiple PDF links, including one to a suspicious S3 bucket URL, further supports the phishing and redirection attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=super+mario+3d+world+wii+download In PDF document text
    • https://cdn.sqhk.co/talidapato/1mhcgsv/best_music_player_app_for_iphone_2020.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/megotebezudosiri.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/8Hfdtic/aerofly_2_flight_simulator_apk_data.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/iahgcjj/drive_ahead_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/fjgJjhJ/microgolfoven_whirlpool_mwp338b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/jolaninewabisafixonetolir.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/assessment_in_higher_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5733913-c3b0-432f-a576-224c88e3634b/arithmetic_sequence_worksheet_grade_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7738eceb-da33-428c-9ccc-94c8a8d9f57f/97546900114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e82feab-c9fb-4fe4-a90c-1b942c1bd52f/wukuxomamexogevofepelod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b3061d-487c-4be5-8a8c-e537308a39d3/khwaja_garib_nawaz_qawwali_mp3_downl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd45ecb2-53c9-42dd-9308-8660519c657b/83072984101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9124c572-63bb-48d6-9964-a261f863dc49/estructura_del_texto_informativo.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_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 5288 bytes
SHA-256: 423b1a4c1bf7cc689c92c2d5e2ca863288f673a0493a7f726928108767dc0218
font_01_sfnt_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 10308 bytes
SHA-256: 87239cd692b954643fb31dcb8d3ea9142bf9fb0a6eedf4d4f897da22b3b457ec

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