Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1aee4c1631e6c5…

MALICIOUS

PDF

70.1 KB Created: 2021-01-13 14:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 19c5d3ed9aa22fc1de6dd71dc5ea2535 SHA-1: c16353ca87169f9a8bd218df3b44d66ddeb7bf60 SHA-256: 3f1aee4c1631e6c5c71e803865243f48a06bd2ae7d941455d094dbfb5ea886aa
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=hopi+day+school'. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest the document is part of a phishing or malware distribution campaign, likely attempting to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=hopi+day+school In PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/binodogotaket_texiku_fejisogalaj_bekamofuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fa970ba765cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5feb4045d8523.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/ijhighQ/4242178179.pdfIn PDF document text
    • https://vipeketiduwe.weebly.com/uploads/1/3/1/6/131636725/a93d524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f8f3147e859f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fc7d57034cd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_5ff656e96e444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f95e09477a79.pdfIn PDF document text
    • https://cdn.sqhk.co/besuduxikuvo/MgeL9hb/arte_de_exploration_craft_hack_apk.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/wixamupelinere/mod_game_candy_crush_soda_android.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/54602803546.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/c_allocator_template_example.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_off0000c8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DF 4612 bytes
SHA-256: 5b6f8248fc3dea58d4b6fe1309e29b7baacaa4d9fffb59022ea263fb96f68679
font_01_sfnt_off0000d88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88F 10936 bytes
SHA-256: 80fb2a0abd13a3f0c0bdefea24b5d8b1983f41c263cfe9ce4c7a9c1707479383
font_02_sfnt_off0000fddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDF 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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