Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa426563ef536ee…

MALICIOUS

PDF

79.0 KB Created: 2021-05-01 04:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ce94b7367417a9c91766294ac01422ab SHA-1: ef02c9e72ded7330e84690b823c42ebec2f9b8e7 SHA-256: 4fa426563ef536eeb8cbfef1564db4158b6b5257ada56087b182d90348ac72ff
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with the primary suspicious URL being vilenefex.ru, suggesting a phishing or redirection attempt. The presence of a PDF link farm heuristic further supports the idea that the document is designed to direct users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=what+does+god+of+carnage+mean PDF link annotation
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/4855599.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/Pjagehg/synchrony_car_care_locations_for_gas.pdfIn PDF document text
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/sasexazezupube.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/9ibgcig/pokemon_red_blue_gameboy_advance.pdfIn PDF document text
    • https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/poximataxesiru-marafusupud.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/KG2ojeB/mumexos.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/chdhfSG/helix_piano_tiles_music_ball_jumping.pdfIn PDF document text
    • https://mulafixi.weebly.com/uploads/1/3/4/3/134317856/bakawetowijajunuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gapivegek/zitesusezivuripe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55b1f0f-6beb-4d83-962a-216de34a2717/famous_daves_rib_rub_gluten_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/39476663478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07826c0-9d2c-481b-a56e-db152f408bf9/zurozisanokimivulujif.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/nds_emulator_for_pc_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/fofokopamotikubi.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/26361395509.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/ecology_community_and_lifestyle.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/jafebukikefetamom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a93169a1-dfd9-4602-9bab-84ffc5f90c95/jagudatolumerivoroge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5573c4-24a8-4ab2-807d-85596342fc39/54997571042.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/simple_and_compound_sentences_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/69510615693.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 5156 bytes
SHA-256: 2b72d91f0c7e24baf88211280797ccd88f023326ee4c00db82b9e3196ef6f7ea
font_01_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 11480 bytes
SHA-256: 0309af0d1325e1be3c71a4a28e50702b120e7aab5e8df99bff6eceef6e261693
font_02_sfnt_off00012072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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