Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d9a14668db9d7a…

MALICIOUS

PDF

72.7 KB Created: 2021-04-28 05:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac2912c3351ec86ebaa3be88221c3587 SHA-1: abac84fb6c8dce6470f5ea9bcaf30a87ac4eca94 SHA-256: 74d9a14668db9d7a296a377c2cf4c1b3d625b7a72e8124a3deaaf1138c4b0741
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a redirector to a potentially malicious domain. The document body, though heavily obfuscated, suggests a lure related to 'basic hindi words for beginners pdf', which is likely a deceptive pretext to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=basic+hindi+words+for+beginners+pdf
    • https://cdn.sqhk.co/defisepeniba/jciijdo/vutuvujosofopilisijuwawo.pdf
    • https://porukugo.weebly.com/uploads/1/3/1/3/131380087/tikererijefewin-vanuj-monekivurob-satazajij.pdf
    • https://cdn.sqhk.co/kobadaxo/XXfjjxG/employment_application_form_template_free.pdf
    • https://luletifolavok.weebly.com/uploads/1/3/4/3/134369244/901620.pdf
    • http://anyita.space/27424530916cjrae.pdf
    • http://chtotakoevuxom.biz/pudozewivokedijonimopqwwsk.pdf
    • http://tegor.xyz/943046252014imbk.pdf
    • http://fullstacket.online/singham_full_movie_hdp5sy3.pdf
    • https://netexebi.weebly.com/uploads/1/3/0/8/130815192/pibemufesogi-tozasaperarotir-tafezi-vulavunudabawe.pdf
    • https://cdn.sqhk.co/giganopof/uKwtSjj/vubamosugota.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wepinipinalojud.epizy.com/fikutevozexonuxe.pdf
    • https://s3.amazonaws.com/divelikubapiwaj/zusoxuvewexuxilozumageso.pdf
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_66f24493c8ca486a8dac7a57c9a52795.pdf?index=true
    • http://leligikolapib.epizy.com/annual_report_toyota_2018.pdf
    • http://lugogugur.rf.gd/radical_candor_executive_summary.pdf
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_5c3a18709e954b278ed7935e511dc760.pdf?index=true
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_ab71ced7bea24b3b8f6bd0207af55a6e.pdf?index=true
    • http://pilukakir.epizy.com/45010411668.pdf
    • https://s3.amazonaws.com/xarojapi/81297210782.pdf
    • http://zewudopufe.epizy.com/fiwonarulodemiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd53.bin
bcdd3b7207671ccdfb172a9e5443da129d951672a541aa8cbcd347c798b31aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 5664 bytes
font_01_sfnt_off0000f0a6.bin
20efeb72a156f7fee35150d9dfa252c301165bd937bbf2aff9bf2661903ff013		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 10812 bytes

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