Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99fb1fc2b1b5057…

MALICIOUS

PDF

79.6 KB Created: 2021-03-20 11:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09fbb03a066ffaf03ec8de1e0d2583e8 SHA-1: 3e190e9c1363434f16ae8ce9a725c6db7f8ba09f SHA-256: d99fb1fc2b1b50575d7d052452e54d62b45786f939208e5b84e2ab17bd2a80ff
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://vilenefex.ru/wix?keyword=kotor+2+dark+side+guardian+build PDF link annotation
    • http://rupuvuk.22web.org/nejof.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/muvako.pdfIn PDF document text
    • https://cdn.sqhk.co/fomiroza/OibENgd/94744540828.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/gapexefalixer.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/b308e872ecb2b9.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/xakatokokan.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/bibojupikag.pdfIn PDF document text
    • https://jodaxirijiv.weebly.com/uploads/1/3/0/7/130776114/bipatuminix-dijeg-fazexomukalini-torotugu.pdfIn PDF document text
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/5748.pdfIn PDF document text
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/joxejel.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/eArow8g/puppet_soccer_2014_big_head_football_mod_apk.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/wodolulozajikivubokad.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hfhbgih/dino_run_2_unblocked_games.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/1ed4e09774.pdfIn PDF document text
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/315c0c81.pdfIn PDF document text
    • https://noselarinagebep.weebly.com/uploads/1/3/6/0/136051947/vafuvavaxazetidija.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/iSgfibW/bodogowetotuxoto.pdfIn PDF document text
    • https://gumevimarijefa.weebly.com/uploads/1/3/1/0/131071167/9956b1430b.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/driver_license_exam_appointment_mn.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/madame_bovary_cast_2014.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/ejemplo_de_ensayo_descriptivo.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/survival_servers_minecraft_1.16.5.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/self_adjoint_operator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekomuvave.myartsonline.com/what_type_of_charger_for_samsung_galaxy_s7.pdfIn PDF document text
    • http://posijibanif.epizy.com/42332066477.pdfIn PDF document text
    • http://piwapikefiraxi.rf.gd/deguxojilikepulovef.pdfIn PDF document text
    • http://ralupuwegilad.rf.gd/vinowuvumuruwedali.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_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 5296 bytes
SHA-256: 18b72c5b8e0a08362a41034756657e66eec1c7594cfd4d65fc7df7dae80825ee
font_01_sfnt_off00010a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3E 11264 bytes
SHA-256: 6c22023d9f7b84f8df119b4384662e15928aaf3ed1ad22293c1aea9f57877d4f

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