Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d175ceec38c323d…

MALICIOUS

PDF

74.4 KB Created: 2021-05-03 11:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: beb471b21335bc0a319ba9b00e23696c SHA-1: d092b22d70ca049a31418140594969c70a440ad7 SHA-256: 9d175ceec38c323d2ab2c5b2a0e61927354bdc33617f204fafd052d308793b92
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with 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 URIs are indicative of a malicious document designed to redirect users to potentially harmful 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://druttle.ru/strik?utm_term=free+printable+map+of+the+world+with+country+names PDF link annotation
    • http://riwalimuj.scienceontheweb.net/what_would_be_considered_a_strong_acid.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/radaxidibu.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/33107492427.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/2020_ashrae_handbook_fundamentals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_6050edfe1fbce.pdfIn PDF document text
    • http://badge-verification-center.com/kabosupazanop456.pdfIn PDF document text
    • http://lianhua.life/kovosevu6paj0.pdfIn PDF document text
    • http://nubemeketetu.mypressonline.com/depreciacion_amortizacion_y_agotamiento.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471690/normal_5fc8c57dd4cbe.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/24542699185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bebojivim.myartsonline.com/72543653556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b259e121-b889-4b0d-802f-c07a32b34b45/gy6_150cc_scooter_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/waxugokunomeme.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/how_to_backup_pc_with_wd_my_passport.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/mururosuwufamujewuvav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60a53eb-a529-4b43-b686-b8afc0f10ca7/70449636112.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_off0000e146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE146 5684 bytes
SHA-256: 7cd8ff6dc53a2b40985b7d45935f84898df0dbee29b82d0c78a1a78acd09d4e1
font_01_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 11788 bytes
SHA-256: 42400e3780edb8d4a60a80d6e84e49f88c006939294a0f725fccb9b011ce7a55

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