Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c3cdcc0d9d7a64…

MALICIOUS

PDF

80.1 KB Created: 2021-03-22 01:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fa296f6cbd6b45649dfcad837b07ee5c SHA-1: cf7c428acf4676b2d6a8e57ad14faca49486e3d8 SHA-256: 99c3cdcc0d9d7a64c97175d2026f7195b52c3e13b9d3acd1317931a7ac624e28
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 links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt.

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://xezojetit.ru/award?keyword=software+architecture+design+book+pdf PDF link annotation
    • http://deliwubavamir.mypressonline.com/siterufovosonoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_60526cc1c5f12.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/68763066375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_6006769c91b0b.pdfIn PDF document text
    • http://bonifacy.site/73515783318vlogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5fd8e1a6b73f4.pdfIn PDF document text
    • http://glossywp.online/20130580584h0geq.pdfIn PDF document text
    • http://daliadiago.com/28926134978qwzss.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455876/normal_6005dbb97f7e9.pdfIn PDF document text
    • http://dokasat.22web.org/2004_chevy_malibu_gear_shift_problems.pdfIn PDF document text
    • http://podipotekoi.ru/dotejikazzpv7.pdfIn PDF document text
    • http://helpforteam.com/dd_monster_maker_downloadz47bv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_60505d18bba7b.pdfIn PDF document text
    • http://lazirawolewok.getenjoyment.net/how_do_i_program_my_directv_remote_to_work_my_tv.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://davofunup.onlinewebshop.net/kuwed.pdfIn PDF document text
    • http://gisinazujawapub.epizy.com/julawetefofutogivabewexil.pdfIn PDF document text
    • http://tujumuvozekusa.epizy.com/how_to_fix_a_craftsman_hydrostatic_transmission.pdfIn PDF document text
    • http://zebinagapovu.epizy.com/23149134817.pdfIn PDF document text
    • http://laburebimefifal.epizy.com/60865338377.pdfIn PDF document text
    • http://xifebudi.epizy.com/9151447390.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 5664 bytes
SHA-256: d3bcdd150e224365f7a290bbf667e7c0f139c0a9ca0481df9446e0e31e9c84c5
font_01_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 11264 bytes
SHA-256: a83eea1a8a64a85c68a7717e5cbf0632ab0245d97bd27e556d0f6559deea096c
font_02_sfnt_off000124d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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