Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d6af9ca80f9364…

MALICIOUS

PDF

75.9 KB Created: 2021-03-20 18:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 930454f3f09a48fa5e1b4e3d66f7489e SHA-1: 515b9ddacad1d6b4175382266d3f5c67a05bcbd2 SHA-256: 92d6af9ca80f936484af5d7da567518967545955d39b39d3a6b2e67c62dd6075
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple external URIs, including a link farm on disposable hosting, and a heuristic for a visual download button strongly suggests a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to 'ultimate character creator apk' and 'wkhtmltopdf', potentially disguising a malicious download as a legitimate software installer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/123?utm_term=ultimate+character+creator+apk PDF link annotation
    • http://rat-red.space/insurable_and_uninsurable_risks34tjh.pdfIn PDF document text
    • https://bexobejunoguwed.weebly.com/uploads/1/3/0/7/130775871/6993076.pdfIn PDF document text
    • http://betmoy57.com/lunugubafemavixjyhv5.pdfIn PDF document text
    • http://chambreapp.xyz/sovoziwunibeta1o2zl.pdfIn PDF document text
    • http://trylait.club/warcraft_iii_frozen_throne_campaign_cheatsimagx.pdfIn PDF document text
    • http://circulshtangcalip.website/series_and_parallel_circuit_problems_worksheetzqt56.pdfIn PDF document text
    • http://mx50off.pro/novawebuzofutezo13ef.pdfIn PDF document text
    • http://liketsven.xyz/what_is_the_branch_of_a_tree_calledxk4n2.pdfIn PDF document text
    • http://vertigoa.online/54338824407tnczk.pdfIn PDF document text
    • https://budasanufewe.weebly.com/uploads/1/3/5/3/135323580/3b03f8dac9.pdfIn PDF document text
    • https://jutikuned.weebly.com/uploads/1/3/5/9/135966087/fevexikufi_kubujirom.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/db95a3b1c76cb4.pdfIn PDF document text
    • http://savupubib.22web.org/can_you_take_the_learners_permit_test_online_in_georgia.pdfIn PDF document text
    • http://kmplitka.shop/73688272163v81cf.pdfIn PDF document text
    • http://thiswaytovogue.com/53398242653w975b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwoxigawezab.epizy.com/effects_of_colonialism_in_south_africa.pdfIn PDF document text
    • http://zopopujeji.rf.gd/muwoditibavokima.pdfIn PDF document text
    • http://rizokimom.epizy.com/zaxodovokunuvomanutak.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/52195460490.pdfIn PDF document text
    • http://tonabezagarizom.epizy.com/kekeviruzojiveda.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/livuzinok.pdfIn PDF document text
    • http://kepatuzazavew.epizy.com/boss_me_50b_price_philippines.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_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 5052 bytes
SHA-256: 62a597e57a17825df97705c8a68e41f747408c7c12532bd0761d8d883a5e7be0
font_01_sfnt_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 10948 bytes
SHA-256: 81e247c0d86b218943dad6386aef4287bbcb8fbf334534cb7f0b959ff1bc9722

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