Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2ec964bb1a7f5b…

MALICIOUS

PDF

80.6 KB Created: 2021-01-14 13:38:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ede053127dffa2b348644a4f864dd77e SHA-1: d339d511e4ed4e178973699072aabb6cb2f761ec SHA-256: 7b2ec964bb1a7f5b93d4951359b9303703bf3cc02a9705c9945b2c90f861e746
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ML and ClamAV, as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, suggesting a phishing or spam campaign. The primary malicious URL identified is trafffe.ru, which is likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/aws?utm_term=arabic+website+templates+free PDF link annotation
    • https://site-1177662.mozfiles.com/files/1177662/w3schools_javascript_quiz.pdfIn PDF document text
    • https://site-1177444.mozfiles.com/files/1177444/tipidarukovikafumixemi.pdfIn PDF document text
    • https://site-1168507.mozfiles.com/files/1168507/nimukabuzevosunerejose.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/ggY6ggj/love_story_films_in_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_5fbbe820a0080.pdfIn PDF document text
    • https://site-1180155.mozfiles.com/files/1180155/world_rally_championship_ps2_download.pdfIn PDF document text
    • https://site-1168250.mozfiles.com/files/1168250/pregnancy_cramps_meaning_in_tamil.pdfIn PDF document text
    • https://site-1168006.mozfiles.com/files/1168006/downton_abbey_dvd_episode_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/sQhexgd/ravens_schedule_2019_results.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/fedojigudaj/10633528067.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_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 4956 bytes
SHA-256: 3531fe29f53b1c3db851cb1b47f23b615c3d02b36abf0b4cdfaeb5a334c5556f
font_01_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 10368 bytes
SHA-256: f6fc5d3d8479dbddef2b3727667547e0ae50eda04838e661bd95f039be20503d
font_02_sfnt_off0001277d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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