Malicious PDF — malware analysis report

Static analysis result for SHA-256 42594114b6cb5889…

MALICIOUS

PDF

71.8 KB Created: 2021-03-02 18:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e3d9a96a31e50397b37c4b59fa4101b6 SHA-1: ea32b9fe7ee4ecffdeb3151b346c385ff4b795b2 SHA-256: 42594114b6cb5889277168da9061dc4226af16aa27da7e40b7158766b892bcf6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain that appears to be part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the overall heuristic profile suggest a malicious document designed to redirect users to harmful content.

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://xajibur.ru/strik?utm_term=how+to+use+omron+automatic+wrist+blood+pressure+monitor PDF link annotation
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/xoziladav-xibewewefivav.pdfIn PDF document text
    • http://coupons2020.info/xoredaa87j9.pdfIn PDF document text
    • http://allrecipes.pro/administracion_estrategica_y_politica_de_negociosgbqxh.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/e8c29378.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/be93351abc.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/6048420549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_5fd95e5cf1a19.pdfIn PDF document text
    • http://thedouche.xyz/summer_infant_camera_monitor_no_signalf19mo.pdfIn PDF document text
    • http://vinorama.fun/league_of_legends_playtimei4i7n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/risisipajole/zoginadov.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/jifikekutuxoxujabaximosan.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/the_danger_of_a_single_story_questions.pdfIn PDF document text
    • http://jikorali.rf.gd/alita_battle_angel_1993.pdfIn PDF document text
    • http://sovizaz.epizy.com/wallpaper_animation_free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 5412 bytes
SHA-256: 4523c205498580a6cef1a8dc0d99c2b6266950ae28e465660c85b5bf30db5e41
font_01_sfnt_off0000ed7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 10608 bytes
SHA-256: c6950098c8950803cbf7c859771e8e08c10b2622c92899e69f568f14f92f2400

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