Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c61dad458383f01…

MALICIOUS

PDF

76.2 KB Created: 2021-02-18 01:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5ed2d712abb791c16a4a4d1195534486 SHA-1: f85073a5a0d7a3dfda1235d0bcf8134464922b71 SHA-256: 0c61dad458383f01376e93394cc8e8b7477a4ae22299108a3f8ece15d85effe5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

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://jottigo.ru/wix?keyword=catacombs+of+priscilla+ap+art+history PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366009/normal_600485ceacfc1.pdfIn PDF document text
    • http://reabook.online/16168283014rrcqs.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/fQXhjhj/16832977780.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/ijbffDw/word_market_2_level_40.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/1lblhhd/tanks_battlefield_desert.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_5fd6649b71dfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408701/normal_6008c00bd929e.pdfIn PDF document text
    • http://tuwavetatifida.iblogger.org/45021964751.pdfIn PDF document text
    • http://asta-stroy.ru/who_tb_infection_control_guidelines9dnvk.pdfIn PDF document text
    • http://srakan.space/nubizojmd1a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://javuturevof.rf.gd/calendar_design_templates_monthly.pdfIn PDF document text
    • http://janepalefudu.epizy.com/avery_label_templates_5395.pdfIn PDF document text
    • http://luvibiw.epizy.com/comcast_tv_setup_guide.pdfIn PDF document text
    • http://pezatiwasab.epizy.com/teaching_english_introducing_yourself_worksheets.pdfIn PDF document text
    • http://vonezilomobupir.rf.gd/27368810359.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_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 5084 bytes
SHA-256: 7b90ca0fa1c672b0565bbcc1cd0bf336c7a2a82cc6beec3fe4b9cb633bbf0eb1
font_01_sfnt_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 10500 bytes
SHA-256: 11d31c6950375162672643179aad0742364a638cb863dccf467c7c82bd646775
font_02_sfnt_off000115bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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