Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f347f56608da417…

MALICIOUS

PDF

74.6 KB Created: 2021-04-04 00:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d727db15a1b71e0eba88574e03179f1 SHA-1: b12f95d11a0476be89e692a1ab0ce3a46987e5db SHA-256: 8f347f56608da417a8f741156d385046ced6d0cffc1fde62cc1ee7627b24f7cf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external links, 'https://seumenha.ru/strik?utm_term=rivers+of+blood+speech+full+text', is flagged as unknown reputation, suggesting a malicious intent. The ML classifier and ClamAV also strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=rivers+of+blood+speech+full+text
    • https://sipemesiga.weebly.com/uploads/1/3/4/0/134095973/favupijaxam_sapok_jiwexovel_rapeverimor.pdf
    • http://kupivse.xyz/vidas_secas_filme_trailerp9m2u.pdf
    • http://carinsusa.com/32173517605ci09c.pdf
    • http://itali-big.space/fiwopuxigasiraleroxbdy2r.pdf
    • http://afracheat1.xyz/19635143742vpc3t.pdf
    • https://daxivikulogator.weebly.com/uploads/1/3/4/3/134308382/pivanone.pdf
    • http://newberginvestmentproperty.com/maze_runner_cast_2014eoof3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vetamedisoz/vcf_format_to_excel.pdf
    • https://uploads.strikinglycdn.com/files/58234405-c3ac-4d8b-a256-335b7bc9b179/runijapepirajobi.pdf
    • https://s3.amazonaws.com/kisagoz/pujiguwisunimanobutekebos.pdf
    • https://s3.amazonaws.com/zuponefi/29715605456.pdf
    • https://uploads.strikinglycdn.com/files/6494cd16-c07e-4ef2-9976-a38ea56112a8/how_to_level_ge_french_door_refrigerator.pdf
    • https://s3.amazonaws.com/lezerawe/harry_potter_game_2020_leak.pdf
    • https://uploads.strikinglycdn.com/files/c4d93911-c582-4019-881f-4e8c87bc6e48/10230163920.pdf
    • https://uploads.strikinglycdn.com/files/c3acaa94-2455-4d95-b2c5-f08e702fc55f/xijazakadazadamomisa.pdf
    • https://uploads.strikinglycdn.com/files/938a99b7-6c0d-4027-b8e0-c357988b7122/jimerobol.pdf
    • https://s3.amazonaws.com/niporofez/mahi_teri_chunariya_lehrayi_free.pdf
    • https://s3.amazonaws.com/jevelel/performance_2018_assurance_vie_axa.pdf
    • https://s3.amazonaws.com/zumomasugipeno/metro_exodus_size_pc.pdf
    • https://uploads.strikinglycdn.com/files/bd2b7f5d-4a8a-4e83-9767-aee5ca7cc31a/harry_potter_and_the_deathly_hallows_2_book_weebly.pdf
    • https://uploads.strikinglycdn.com/files/99706e40-300b-46c7-aed8-0a3ace435ce5/peavey_classic_50_2x12.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_off0000e59d.bin
9ce63cb789bf9a130d28cc4025374078e938cf83cd8b1aa62bddca69a9b33aaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 5308 bytes
font_01_sfnt_off0000f7ad.bin
f5c3bbba09eab556dcf3d1d3b5ed4768308eb6799091644d5cd53f6f36ba3e73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 11008 bytes

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