Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3292bf7bb3dd01…

MALICIOUS

PDF

71.7 KB Created: 2021-03-15 04:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8befef2aee8ad8a65e6addafa8f5522d SHA-1: 4942d0bbee43fd51bf4fe83695a8a65bdecdc019 SHA-256: 3d3292bf7bb3dd017ac4c4d302ecbdad14ee5adf5c3a3b278b8ad2c365a45665
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links pointing to various domains, many of which are associated with disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used 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://vilenefex.ru/123?utm_term=lagu+audy+item+temui+aku PDF link annotation
    • http://digitaltoolsfor.xyz/23619979254y5o4q.pdfIn PDF document text
    • http://awpmode.com/88982595110sxqga.pdfIn PDF document text
    • http://fevuworejefe.iblogger.org/javascript_tutorial_point.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/9380016446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5fd068e512116.pdfIn PDF document text
    • http://setofexperience.site/garmin_935_vs_920xt3rnsq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472204/normal_5fc985b5a8808.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/38776337248.pdfIn PDF document text
    • http://feyakast.online/ruxojegojepipigugebemofe61i6o.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/jarolavavigulaparol.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/midosatugebida.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/tawosutosuxi/zirumokanuwulewiti.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/babedevujinunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293678b9-8c2a-4e19-9a8f-92acae27a30d/medizovibufoponusevuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4baa73-f789-4889-9214-e178c902dec5/garmin_nuvi_2757lm_mount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5d54a7-48af-42c5-b3e4-10e9c6c334f3/97633950473.pdfIn PDF document text
    • http://maretomutopa.epizy.com/21282226113.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/juwakoripematez.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/whatsapp_plus_2019_uptodown.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/97168136873.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_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 4948 bytes
SHA-256: 5dca78d9fc72e52e49902dfcfc524f99c6208b26d0b13b6c5cd0416b039faac9
font_01_sfnt_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 11268 bytes
SHA-256: 48c5ac3734570b46c4192e562e2695e8e9295a5587fbbf11e862e2d45c127616

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