Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ea7ddfb20bdcc6…

MALICIOUS

PDF

93.9 KB Created: 2021-04-02 08:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0c41e364376977eb41f8b66c64ad1ae2 SHA-1: e147ff7dc8f1393555e6e65990694c2b9a40decb SHA-256: c3ea7ddfb20bdcc6eb3d069bd6a4d959a940c4587fdfe33e1f155711b8e2e287
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/wix?keyword=escalation+clause+florida+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446765/normal_605655acc87ba.pdfIn PDF document text
    • https://xudinenudomojuv.weebly.com/uploads/1/3/4/3/134356320/4036792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5fdc6951cfe16.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/bugfzhb/stupid_zombies_3_mod_apk_download_apkpure.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/baropi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fd82a346911b.pdfIn PDF document text
    • https://wuwawibef.weebly.com/uploads/1/3/4/6/134608234/1d2cb07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_60344c8b0dacf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_6003863bd6602.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/35156c1c5421.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/hjdjjdb/kaleo_broken_bones_lyrics_deutsch.pdfIn PDF document text
    • https://pezevibasa.weebly.com/uploads/1/3/5/3/135306661/110b96f7.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/8708686926.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/aEjgrGi/private_downloader_apk_3._0._1667.pdfIn PDF document text
    • https://cdn.sqhk.co/segisaxa/jdjeheD/boss_movie_songs_bestwap.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/jQyz9ig/kamunupojikiro.pdfIn PDF document text
    • https://zawurufaxi.weebly.com/uploads/1/3/4/8/134861846/zurunujomagikib.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/2cba1a205deea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jufogitomob.onlinewebshop.net/bifomenofa.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/normal_12_lead_ecg_report.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/lotitamafalasimemipi.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/roworomoxopisive.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/90345383553.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_off00012f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F46 5108 bytes
SHA-256: f94a19e50be1d58707fe9896d3d73f6f923aa38bd9156a2a59115577738aac23
font_01_sfnt_off000140b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B8 11592 bytes
SHA-256: 604a1761a1d0f8b6bcd637c76db48b9a8b2f329280789cd96c93165da3a8fe80

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