Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb05a4b2f5d0a24…

MALICIOUS

PDF

73.4 KB Created: 2021-02-23 20:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 36c2e355aa82b18d5f55d0636a1707e0 SHA-1: 38d79e34b53242946919c73bc27cee58f247daa2 SHA-256: feb05a4b2f5d0a248a4ce0c3872453897499501e9b0cad29da7a2692a405cd2c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL pointing to a site offering 'ims volte interview questions'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

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://jottigo.ru/wix?keyword=ims+volte+interview+questions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447079/normal_600f9143a042e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fef91fe08c38.pdfIn PDF document text
    • http://jadebey-x.com/luciferase_reporter_vector7ly09.pdfIn PDF document text
    • http://smartycredit.info/minecraft_skin_narutogex4u.pdfIn PDF document text
    • http://cozyplacefor.rest/bosch_brute_jackhammer_handle5ovdn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_6003fb5f03ef9.pdfIn PDF document text
    • http://doucheop.xyz/2949226010612e75.pdfIn PDF document text
    • http://nosetibadap.iblogger.org/askfm_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tunawibiga.rf.gd/what_is_a_callus_on_your_feet.pdfIn PDF document text
    • http://lusiromipu.epizy.com/school_blank_calendar_templates.pdfIn PDF document text
    • http://nogomazarem.epizy.com/onbase_18_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/caspian_report_twitter.pdfIn PDF document text
    • http://pudubekij.epizy.com/91680856806.pdfIn PDF document text
    • http://pajamenu.rf.gd/54012084681.pdfIn PDF document text
    • http://jaziwovapotulit.epizy.com/timaxanarisijusod.pdfIn PDF document text
    • http://supisaminuwon.rf.gd/gudirojalidebetotar.pdfIn PDF document text
    • http://diwukimip.epizy.com/honda_fit_2015_review_consumer_reports.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_off0000e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 4836 bytes
SHA-256: 6d67572d24745fd746959527f0d5353ec68fcc65f5f8770c38857e063d31e434
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 10440 bytes
SHA-256: 6894c7e9040856645645da50c6772eb6ea059282fd363b9bcdd0168dd932e8d4

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