Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e1f6093a5db7af…

MALICIOUS

PDF

66.5 KB Created: 2021-02-23 06:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5db8fb1f206d24a46556fae2ba83a1f1 SHA-1: ec1dbbaa648c715c7c71c332a8913901c44e55cf SHA-256: 02e1f6093a5db7af2eceabf4ad5335dc4d14e1655777dbc78ed0e93c1d0f1310
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 domains and employing UTM parameters, indicative of a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further corroborates this assessment.

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/aws?utm_term=food+life+hacks+for+school PDF link annotation
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/gabaxetal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_6014e1246f97e.pdfIn PDF document text
    • http://jazajozem.iblogger.org/gavurugapufitesopetetes.pdfIn PDF document text
    • http://laloxugire.22web.org/how_to_use_roku_remote_finder.pdfIn PDF document text
    • https://zuvofuguwapu.weebly.com/uploads/1/3/4/0/134042474/4cc79b7a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_601b8bf2e3783.pdfIn PDF document text
    • http://boomua.site/tijufafqbq6z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5fdf157c1d5f5.pdfIn PDF document text
    • http://supermagazforsale1.xyz/kipufobowepubimatesosopim9pkc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_6009805844084.pdfIn PDF document text
    • http://pudevivufug.22web.org/vodalo.pdfIn PDF document text
    • http://dazipuv.iblogger.org/cateye_strada_user_guide.pdfIn PDF document text
    • http://itash.space/833654431732ajeh.pdfIn PDF document text
    • http://eliyalte.com/xezodiji62pcs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_603291108d784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogutofarori.epizy.com/71942939145.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_off0000c940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC940 5128 bytes
SHA-256: ffc28960e2ac33cde4a685819709a4a960a1e83567734cef593d97a2d98a9bf5
font_01_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 10152 bytes
SHA-256: 54496609f0fb6e3556a0256a9f4c3e5a3faa3453d93bf9e859a1e14ba717d84e

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