Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbf1b6dc6fa8ce7…

MALICIOUS

PDF

73.5 KB Created: 2021-01-15 00:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7973afabc1f6752e926a29a94ac4bab1 SHA-1: 72e7d80ee615af0e7889272cf05def2f4fef7f00 SHA-256: ddbf1b6dc6fa8ce760a8f678e77ef5f30effe9b33fdecf57295bc73c05454c14
196 Risk Score

Malware Insights

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

The file is a PDF that contains a mass external link farm and is flagged by ML classifiers and ClamAV as malicious. It also includes a heuristic for a password-protected archive lure, suggesting it's designed to trick users into downloading further malicious content. The embedded URL points to a domain associated with phishing, and the linked PDF is likely a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/aws?utm_term=buscar+un+iphone+desde+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fca2fd3deda5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5feda0845b518.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/9dc8bdc64.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/bShhPQs/64208104151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff6a632138c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5f99777b0ac53.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/nhfgjEN/dino_run_chrome_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5fd8fc6401e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5fd9a6b5c7967.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/wesezuzuvalirik/85287670447.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/hubspot_inbound_marketing_certification_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/33175213021.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/clases_sociales_en_la_epoca_colonial.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/juliantina_movie_release_date.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_off0000d39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 4980 bytes
SHA-256: d659e6fb6a215e72604f353c61576921ed86ab5f0921d1d7760c526859d39eac
font_01_sfnt_off0000e46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46D 11204 bytes
SHA-256: 653e21b7ff32a6703bc4a8603d21b6c402044741d85a398697a2fbd842f55732
font_02_sfnt_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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