Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfbd9c24c34b152…

MALICIOUS

PDF

114.6 KB Created: 2021-02-28 01:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b0cd9f163850df3cf3a6ec76f90dce1 SHA-1: 3553a7dc5a4332e1d9dd48d42945fc19ff61e876 SHA-256: 0dfbd9c24c34b15296a4b71161f7e4cd238fb3f35f580bcaba5239439e2c71fe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://nipisod.ru/123?utm_term=what+does+parakletos+mean PDF link annotation
    • http://tunulawofu.iblogger.org/fizabotegobis.pdfIn PDF document text
    • https://zapedumukovig.weebly.com/uploads/1/3/0/7/130775012/278150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_60206fa535a4d.pdfIn PDF document text
    • http://fivogudog.iblogger.org/46184624068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367905/normal_6000d8fed92fd.pdfIn PDF document text
    • http://vipmanmarket.space/41596085056qyl37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_601ffd766eadc.pdfIn PDF document text
    • https://befibexa.weebly.com/uploads/1/3/0/9/130969759/fufewujamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393890/normal_601dbfa4d7bde.pdfIn PDF document text
    • https://fetuxugov.weebly.com/uploads/1/3/4/6/134655394/sejelufive.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/nisoxow/12750828501.pdfIn PDF document text
    • http://ronufabadexulab.epizy.com/bollywood_new_hd_video_song_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/kafetu.pdfIn PDF document text
    • http://dajejat.rf.gd/snow_smart_teeth_whitening_system_reviews.pdfIn PDF document text
    • http://juviwutifazav.rf.gd/jibogimawabojedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CC6 2960 bytes
SHA-256: d8ef148c594adba1946aa7d95f188f3f33f69c77bc22762a1a4a57bcfd89a796
font_01_sfnt_off00018748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18748 5276 bytes
SHA-256: 7930b8b0be061add7212c795a354966a183b38b7b15e931dd18367d852960769
font_02_sfnt_off00019919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19919 10492 bytes
SHA-256: 13b228a50e83ed0458eb9abbad59ac3debf340353a2cb105b99f637c68c75876

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