Malicious PDF — malware analysis report

Static analysis result for SHA-256 271e88dd4ccef75a…

MALICIOUS

PDF

90.1 KB Created: 2020-12-25 00:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b5ab78c282f64778b6a490e69ecb4505 SHA-1: e19e90c31fed21019d0425de106e4f894773a737 SHA-256: 271e88dd4ccef75ab881cc89461d4e1c92d1bfa091bf875d8c0351b832916305
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites designed to host more malicious content or redirect users to phishing sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malware. The presence of a link to known malicious redirector infrastructure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=resident+evil+capitulo+final+personajes In PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/a1eb801738bae.pdfIn PDF document text
    • https://xapotaligefako.weebly.com/uploads/1/3/4/6/134612972/7439650.pdfIn PDF document text
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/rogasexap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5fa924b1e4eef.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/2432337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_5faf8fb5186db.pdfIn PDF document text
    • https://rezolokad.weebly.com/uploads/1/3/4/7/134718373/ketexijubobopo_pufutat_vematuxoxed_vugivu.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/004aa401-ccb6-4b7c-b12b-8b7ae3e54fa2/60754945388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8826afaa-d272-4bef-a28b-03582e2e338e/65567446498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2889d6-c525-4e00-afd9-b3c93857b110/gasakawivemejifidotowelo.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/campbell_hausfeld_iron_force_framing_nailer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/50880211905.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/tinker_board_android_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/joomla_blog_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/battlefield_v_pc_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505d005d-8c64-4f45-8009-2af6062dfd66/25256091496.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_off00010345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 8364 bytes
SHA-256: dbadd79189ae679bb08a6002e4ff2349aa09a5cf21b8e86adc9aece871a380f5
font_01_sfnt_off00011e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5B 5292 bytes
SHA-256: 08f6a908b04c76a8ee5d5e4f5870954c0a7e20a9238be6d352f04e5181b42c64
font_02_sfnt_off0001307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 12720 bytes
SHA-256: 030a300cf606d9f6682caa4a42794cce9636881dca85e340cfef0f01946e3a74

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