Malicious PDF — malware analysis report

Static analysis result for SHA-256 5998bacf30a66338…

MALICIOUS

PDF

82.6 KB Created: 2021-03-14 21:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cd2d03a60d7a08fbd6d1b837c429014f SHA-1: bc1c31402d0732930e9e9477aba54f789d2fc9c1 SHA-256: 5998bacf30a66338803af1a610b821543d2d75c38d4284c44781acbede2e089c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used to host malicious content or phishing pages. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/123?utm_term=physical+chemistry+experiments+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5feb0a0314155.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/alimentacion_complementaria_minsa.pdfIn PDF document text
    • http://islandlandscapesbb.com/14606186451cni3f.pdfIn PDF document text
    • http://mikrotikwizard.com/mepujolagudidafjzn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_6047d98d95aea.pdfIn PDF document text
    • http://d-youtube.com/chick_fil_a_8_nuggets_nutrition_facts8x9qj.pdfIn PDF document text
    • http://kolegutoravi.mygamesonline.org/britain_for_learners_of_english_james_o_driscoll.pdfIn PDF document text
    • http://gamedv.design/27487858554vtahn.pdfIn PDF document text
    • http://websecurer.tech/who_are_the_actors_on_fresh_off_the_boato0tgp.pdfIn PDF document text
    • http://itawegan.space/mumoxinowugifoki03s4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fed179e84b83.pdfIn PDF document text
    • http://creditreportusa.info/36189047866vx7jl.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/steam_boiler_specification.pdfIn PDF document text
    • http://reactivascotia2020.com/nujonexepewefnp3u5.pdfIn PDF document text
    • http://blancop.xyz/jamman_solo_xt_owners_manuallv6jw.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/xonefawiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://belibivizonojo.myartsonline.com/kiwajotibobedesog.pdfIn PDF document text
    • http://liwetagosozel.onlinewebshop.net/nizutobaduniz.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/59195917563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814ad3f3-146d-47a0-9892-9b881cdd4980/bersa_thunder_380_hollow_point_ammo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d915a651-02d1-4b71-893b-2f734ff89494/61106827130.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/79498585051.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 5568 bytes
SHA-256: 8fe2e66a4ff2f4af133d4e518029be0881b8ef9c2166e644b3ea5365ce7daa81
font_01_sfnt_off000116bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BF 11320 bytes
SHA-256: c3b5a849a4d5e371728fb1288489d869e394a55785ac0e3b4b4f4f968481dfc5

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