Malicious PDF — malware analysis report

Static analysis result for SHA-256 35854ee85c41c679…

MALICIOUS

PDF

67.7 KB Created: 2021-02-20 22:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef4df726fd785e7f27a77c94fe9edc59 SHA-1: d64313c77da01d525ae5f50cb2da5167aa7eef6a SHA-256: 35854ee85c41c679a7dd2e9975c635d924149bbbf933ff731a95dfa9c7f77fd1
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 is flagged by heuristics as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the structure and URL patterns suggest an attempt to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=the+one+thing+gary+keller+ebook+free+download+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421339/normal_602c807d08818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_602a2722211eb.pdfIn PDF document text
    • http://zeraseb.66ghz.com/simekazazowanuvato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6019e10851023.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/83lhdhc/kaiser_downey_covid_testing_hours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486344/normal_5fecc87fb8ae7.pdfIn PDF document text
    • http://dkmz2.club/blackberry_evolve_android_piewl195.pdfIn PDF document text
    • http://tuwafanumi.iblogger.org/13993918557.pdfIn PDF document text
    • https://cdn.sqhk.co/disovaje/GSjeogi/lego_star_wars_micro_ships_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumazudu.rf.gd/fivamofeniritibamirupiwo.pdfIn PDF document text
    • http://xovefepotulat.epizy.com/concrete_column_design_spreadsheet.pdfIn PDF document text
    • http://rawozovikoruros.rf.gd/fitted_sheet_twin_xl_cotton.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_off0000caba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABA 5472 bytes
SHA-256: 76adf678494c4932f7e06b9c8b206b135f3140ad0ac67b4cc910cae47e8ffd3c
font_01_sfnt_off0000dd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 10752 bytes
SHA-256: 496b96b8f9719f9e1823b9aaf7ff84abaa86b0b01841ad00b4e4e5e724efb6d3

Open this report in the interactive analyzer, or submit your own file for analysis.