Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f199e3bada3925d…

MALICIOUS

PDF

72.0 KB Created: 2021-03-20 14:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a7432ff4a3cc25a223a5aa5af4be8dd5 SHA-1: 764f4b75b4e22d08f944a946a8157c6c43b3ae35 SHA-256: 7f199e3bada3925d0441f3de8e6436951e9091774c781a4c79deaef82a22114b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=dark+souls+3+dlc+ashes+of+ariandel+guia PDF link annotation
    • http://usmileofficial.site/genupcor3h.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/25729089818.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/rusamiriwumawowenemonizak.pdfIn PDF document text
    • https://cdn.sqhk.co/pinepopowig/Dlhi5M3/kolorob_new_islamic_song_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/anqQ4j8/watolivamala.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/3HihhjX/design_my_dream_home_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/inC3jcR/99381051889.pdfIn PDF document text
    • https://fasepilof.weebly.com/uploads/1/3/1/1/131163931/a244f04450.pdfIn PDF document text
    • https://zefisazivite.weebly.com/uploads/1/3/5/3/135314851/xudapulevatola.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/zalesiwesopezrew5h.pdfIn PDF document text
    • http://bluhgang.best/lenovo_y50-70_touch_driversw60ic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadezanunadafik.myartsonline.com/lg_refrigerator_service_centre_in_vijayawada.pdfIn PDF document text
    • http://vavadot.onlinewebshop.net/97298227052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c4d86d-21e9-452b-a71a-24879ab9e322/the_republic_of_sarah_premiere_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffef4fd-9c79-4681-9795-be69687b2300/xidesukoluremejusenerib.pdfIn PDF document text
    • http://soxidavalib.rf.gd/what_does_a_legal_memorandum_mean.pdfIn PDF document text
    • http://gulesovel.epizy.com/atresia_de_vias_biliares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3ee705-75ad-451d-b3fd-d57fd37fae3c/60828614940.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 5508 bytes
SHA-256: 3e60ec9af9fd860fdf2b309ef319e28719dd90f02f17c24cb506781edffdb927
font_01_sfnt_off0000ee68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE68 11092 bytes
SHA-256: 72b2ec8c2ecdf382ec1e424177d404b53ba5fe89f32dbfbe2c4e06e0ced60f25

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