Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39829f95063f24d…

MALICIOUS

PDF

77.8 KB Created: 2021-02-28 06:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0177a556398e5303ffb7682c1dff9879 SHA-1: 72e84a29e7ef1e52f85d78bbadf63359d15462ea SHA-256: f39829f95063f24d41098b84915c30d40af0a4bd706ccace5739ca7004b6f721
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though partially corrupted, contains text suggesting a lure related to 'Senate document 43'. Numerous embedded URLs point to disposable hosting domains, indicating a likely phishing or malware distribution attempt.

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
  • 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://soxebez.ru/wb?keyword=senate%20document%2043 PDF link annotation
    • http://idealslim-ordina.site/free_food_inventory_sheet_templateg7agd.pdfIn PDF document text
    • https://pivazadigemeza.weebly.com/uploads/1/3/4/6/134642233/411f3e471e9.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/egeibja/nivasegojedoxuxugawusika.pdfIn PDF document text
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/vavotu.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/tMnVGhf/xazatewuzemapujatabezogu.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/3444272.pdfIn PDF document text
    • http://conicppjry.bid/women_under_stalinodppq.pdfIn PDF document text
    • https://rovorakule.weebly.com/uploads/1/3/4/7/134774255/a0e15d5895b4e.pdfIn PDF document text
    • http://gallery-shop.site/19909608405znfda.pdfIn PDF document text
    • http://onsideball.info/what_order_do_you_watch_divergentoeic8.pdfIn PDF document text
    • http://fridgeservice.ru/58471655925htw9p.pdfIn PDF document text
    • http://presentinsta.site/how_to_service_a_trailer_wheel_bearingd4bq8.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/ghijdjj/flipaclip_cartoon_animation_creator_art_studio.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/fisulefajow/behringer_xenyx_x2222_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/leigh_guided_busway_fares.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/google_chrome_web_browser_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/romojubonunirogi.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_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 4968 bytes
SHA-256: e1e70c429674cc43d5e616766665acd427a5383192743dfccad1830975bdbf8d
font_01_sfnt_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 11152 bytes
SHA-256: 2f295bc050244ee5f4360da26b4f2839c4134526b57ee711d996412702e31480
font_02_sfnt_off00011c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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