Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b655385b1b364e0…

MALICIOUS

PDF

73.2 KB Created: 2021-04-09 17:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: bd0d0504d608bb6b9057a223cca5f274 SHA-1: 4d98bf124e84f95ab39952cf4550dab7eb411da4 SHA-256: 7b655385b1b364e0237be5e7333d9cb5b38eabd273593a6364da69baf7835362
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's primary purpose is to redirect users to malicious sites.

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://nipisod.ru/strik?utm_term=magic+mouse+2+review+2020 PDF link annotation
    • http://linza.media/983915655966ajmq.pdfIn PDF document text
    • http://zevixoleg.iblogger.org/whatsapp_status_online.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/zifusola.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/les_pices_de_la_maison_en_anglais_exercices.pdfIn PDF document text
    • http://jabodaligononu.iblogger.org/balanta_de_verificare_model.pdfIn PDF document text
    • http://semengergel.ru/flat_pack_furniture_assembly_instructions8sdeu.pdfIn PDF document text
    • http://kikotukujumosif.iblogger.org/how_do_you_fix_a_washing_machine_that_will_not_spin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zabirozoxut.epizy.com/budget_management_and_control.pdfIn PDF document text
    • http://wupomadupu.epizy.com/33850475773.pdfIn PDF document text
    • http://vosimamasi.epizy.com/kigiduki.pdfIn PDF document text
    • http://dodudulu.epizy.com/origin_of_word_answerable.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_701b900acd0a4f758e062570e378d570.pdf?index=trueIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_220a2750da1f4bb9a8c55ee10cf7c2ec.pdf?index=trueIn PDF document text
    • http://derusevar.rf.gd/lozalevusorufu.pdfIn PDF document text
    • https://e4c06157-4c4c-4c30-848d-1ce07482e123.filesusr.com/ugd/99e070_b028fc1285b1419fb5d2e7fd3a85fd28.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_442401413a42433bb3e7a0f033ba5b81.pdf?index=trueIn PDF document text
    • http://kedisijusa.onlinewebshop.net/cadaver_synod.pdfIn PDF document text
    • http://xonuzerupivivi.rf.gd/mugibusajulu.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_off0000e179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 5520 bytes
SHA-256: 0ea473292c11e59d80f0636bf62d5a2289d9320cd6e1af3bd7819d6160bc3e95
font_01_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 10364 bytes
SHA-256: e95a5d6d9cd4668e78f1ecd9a1b8c5522294661e7a33a68865c2e7b965d73f3c

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