Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64e8d9751a6c605…

MALICIOUS

PDF

83.5 KB Created: 2021-01-03 06:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bc2febe11703e04119a9c032bfe884bf SHA-1: e6f7631c87cb9b015c5361019a1bd2d2a52fd236 SHA-256: e64e8d9751a6c60546a1f03ad45ad7fb2ad944d5dbc02129d0c14136023b6ef7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=civic+association+vs+hoa'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to infer a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=civic+association+vs+hoa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_5fdbb55369daa.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/gKghGjf/puzzle_dragons_z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fb75a3d2c8ba.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/cXjgyhi/big_bang_theory_actor_heights.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fc262fc01aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5f8c8f159e987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491398/normal_5fc479ed6b9c0.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/makumapikeze/lake_konawa_oklahoma_fishing_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/papalojikajino.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/waxatiguwumanalevitig.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/bind_parameters_in_oracle_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/meningite_bacteriana_ministrio_da_sade.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/datenika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1717527a-00c5-4452-b310-b95de2cb5c7b/minecraft_windows_10_edition_apk_download_pc.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_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 4512 bytes
SHA-256: 967da3f5de3f21a2e7f9d86107e149f2bd7cc3f37257bb0fee90e248645aee03
font_01_sfnt_off00010a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7B 11980 bytes
SHA-256: 7116a5cc1d5a421fee9a45e1dbaa9fd3c6845f4eb9b969ed8dc55d569c5885ce
font_02_sfnt_off000132d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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