Malicious PDF — malware analysis report

Static analysis result for SHA-256 d690754870842047…

MALICIOUS

PDF

76.0 KB Created: 2020-12-27 04:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ca32a2f56261de67e9782cf20e574903 SHA-1: d69aede32254ae26dc89c3a2188cebccf31dc547 SHA-256: d690754870842047a0b588177f4a37067998343aff99a6021d7505e0a1969f56
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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=periods+3-6+ap+world+history In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385216/normal_5fa8950fa5187.pdfIn PDF document text
    • https://cdn.sqhk.co/mikakiraw/ih6gft9/soccer_hero_apk_mod_2._38.pdfIn PDF document text
    • https://jatufajikovuna.weebly.com/uploads/1/3/4/7/134719937/7329154.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/juwobez.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/jhjh8Ff/download_stupid_zombies_3_for_pc.pdfIn PDF document text
    • https://nebemono.weebly.com/uploads/1/3/4/3/134331812/af6871524c.pdfIn PDF document text
    • https://pomerizumuwer.weebly.com/uploads/1/3/4/5/134523620/paforaman.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07980303-140e-4bbe-8e4e-762bed88882b/8660831301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19b00ba-7098-4852-b88c-3114ba7c0dde/hoi3_black_ice_germany_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c134708b-0119-433c-8e3d-a3cd0b5ada48/halo_mcc_population.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11cf3dbb-443d-4941-b3dc-17888e9ede1a/43614889820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9f8c5f-7883-4673-a1e6-e560aebfb3a4/charles_bukowski_on_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d829b4-6fce-45e1-b474-4456850f031e/64578091039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a6aba4-f861-4e53-8b00-44de2f95018b/hitchhikers_guide_to_the_galaxy_character_also_called_ix.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 5592 bytes
SHA-256: 56fec491f161e6554086af08bf8b32eaf9e6d91b627f7137450b093f21eed249
font_01_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 10884 bytes
SHA-256: 47c7f41e7d384897d73681c4f251889e2f43b85ad49c5a305c8b17a95300e50c

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