Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a70f3669ee7c3f…

MALICIOUS

PDF

71.9 KB Created: 2021-01-15 18:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 687ae4ec04159876bfbf4653b559e63d SHA-1: 6d55df8bd322f2c12e6fcca87673efaf46d3f80c SHA-256: d4a70f3669ee7c3fed9d4b7686db107b248d8a5404f3c3a17fa17d63aa6203d1
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://traffine.ru/123?utm_term=los+pasos+perdidos+personajes'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support the malicious nature of this PDF. No scripts were extracted, but the embedded URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/123?utm_term=los+pasos+perdidos+personajes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_5fdb27f367fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450730/normal_5fad4d75a9274.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/jYAhcPB/dubbo_to_broken_hill_road_trip.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/jjlhehh/crashing_season_2_episode_1_watch_online.pdfIn PDF document text
    • https://site-1238341.mozfiles.com/files/1238341/happy_rider_wheels_game_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5fc1c9d147ffc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382793/normal_5fec15a6afed2.pdfIn PDF document text
    • https://site-1247186.mozfiles.com/files/1247186/45412066421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5fbe029f699ac.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/kevava/47067576602.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_off0000ce7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7B 4644 bytes
SHA-256: 483f76532e5715fb4d9dc30855d915035421d4fdb759b61e2b712ecfd4ba3a9a
font_01_sfnt_off0000de46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE46 11312 bytes
SHA-256: 09b2584e1f77e5eb89ac4bb03f6afe977ef5cdeb42b58792f037cd8bf385b883
font_02_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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