Malicious PDF — malware analysis report

Static analysis result for SHA-256 59876e02dad800f6…

MALICIOUS

PDF

78.7 KB Created: 2021-04-03 09:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9cd2cacd0ab16e622808245c1aebe0d1 SHA-1: e931f31a72e2cb1afca153e271882926d89c0306 SHA-256: 59876e02dad800f68cdb52798cb468361e6905b738753ced75e587f846b042f7
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, contains keywords related to sheet music, likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/award?keyword=bridge+over+troubled+water+sheet+music+pdf+free PDF link annotation
    • https://cdn.sqhk.co/zesonixiv/aI6gihh/goted.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/4Txfjha/mcdonald_s_stop_serving_lunch_hours.pdfIn PDF document text
    • http://fodagirikazed.iblogger.org/1227180293.pdfIn PDF document text
    • http://tisigetid.iblogger.org/best_hearing_aid_brands_in_india.pdfIn PDF document text
    • http://tiwigibafofovit.iblogger.org/vipavokoxufubesem.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/hdcgjaM/kusiwijazeforuluwisoj.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/hjaC2ic/what_is_the_song_man_down_about.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/3d6fd07ba8.pdfIn PDF document text
    • http://wojifos.22web.org/39003753183.pdfIn PDF document text
    • https://xojurumute.weebly.com/uploads/1/3/5/3/135328527/0759c1ca4307.pdfIn PDF document text
    • https://wutadesojijemez.weebly.com/uploads/1/3/4/3/134393937/7961100.pdfIn PDF document text
    • http://jigavot.iblogger.org/1945385804.pdfIn PDF document text
    • http://sedobepotorosi.22web.org/concerning_hobbits_tin_whistle_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/Z2hijdp/nawirisepugulo.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/bowetavov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zugemanuzori.rf.gd/weborimojakufona.pdfIn PDF document text
    • http://zifofupox.rf.gd/verb_agreement_rules.pdfIn PDF document text
    • http://lirepemewepe.rf.gd/vopak.pdfIn PDF document text
    • http://fuxodenajakifut.epizy.com/adblock_opera_windows_7.pdfIn PDF document text
    • http://fabupumow.epizy.com/5829376678.pdfIn PDF document text
    • http://podaviloridi.rf.gd/phet_balancing_chemical_equations_answer_sheet.pdfIn PDF document text
    • http://genenapukiral.epizy.com/tipumanosatasumusimonafu.pdfIn PDF document text
    • http://lagunuriteg.rf.gd/delhi_metro_map_master_plan_2020.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_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 5912 bytes
SHA-256: 7119a89ec3f6293c4fc96fb6c3cc70c345b367ce203ae6b63b02b55353b0e772
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 10844 bytes
SHA-256: 1d61197c7b5f3aff45e0cafe5a9257cb63f0c7566bc00605dacad39e337f56d7

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