Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36629d53fe4a5c0…

MALICIOUS

PDF

71.6 KB Created: 2021-02-26 19:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7f9a143edadda72b8449f01d4c2094ad SHA-1: aab83f2956880f02c160012dd0cd065707043057 SHA-256: d36629d53fe4a5c0bc4cbfe2bdcc84091c3ae4e13532f9acbb819e9c3fa9a955
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically linked to a search query designed to appear legitimate. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and a link farm heuristic further supports this, suggesting the document's primary purpose is 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
  • 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://lozipotod.ru/strik?utm_term=does+old+navy+restock+sold+out+items PDF link annotation
    • http://kegujusotuk.iblogger.org/the_crown_season_4_cast_lady_diana.pdfIn PDF document text
    • http://momarivido.mypressonline.com/dibunewujigibojubugafuji.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/87408302831.pdfIn PDF document text
    • https://womiridiwudawap.weebly.com/uploads/1/3/1/4/131408248/611c2c9214664.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/rivitovadiw.pdfIn PDF document text
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/gukonax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xokopaxitake.rf.gd/bahubali_1_songs_telugu_starmusiq.pdfIn PDF document text
    • http://deketinak.rf.gd/rasaxeladijamitujul.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/xemigudasoxufaz.pdfIn PDF document text
    • http://bitines.myartsonline.com/61648197928.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/vehicle_pre_purchase_inspection_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/27640346955.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/bujumo.pdfIn PDF document text
    • http://misibinebob.epizy.com/alternative_answers_to_thank_you.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/35372399667.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/zepetojus.pdfIn PDF document text
    • http://tixixomevupot.rf.gd/monitoring_evaluation_and_learning_tools.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_off0000da0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0E 5312 bytes
SHA-256: 377bee62d5397afd3f95f714ca94fe40b5464408045800d23ca71d2f6b9ac06e
font_01_sfnt_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 10848 bytes
SHA-256: 8e4f1fdb5edfa96d38617446969a3bb69e5c07dc18e18db47f326b9355954c8d

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