Malicious PDF — malware analysis report

Static analysis result for SHA-256 062d12e3558d0b44…

MALICIOUS

PDF

162.6 KB Created: 2021-04-07 13:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 820744e6c4a7e7e617fff96420ff683b SHA-1: 8150eaa23c9e51edc43623cc633a56ec226711cc SHA-256: 062d12e3558d0b44277a701f3d6dbb2c424743e2654f5b152584632d38c1dbce
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL being https://nipisod.ru/wix?keyword=fallout+3+perk+build, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to contain metadata related to 'Fallout 3 perk build', likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=fallout+3+perk+build PDF link annotation
    • https://bugabomusajo.weebly.com/uploads/1/3/4/5/134509224/6e86fdc6.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/ifjcotz/35679345972.pdfIn PDF document text
    • https://vuzigalami.weebly.com/uploads/1/3/5/9/135960382/4474509.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/hcKADig/wood_carving_kit.pdfIn PDF document text
    • https://nijusalelazi.weebly.com/uploads/1/3/4/8/134875584/9989371.pdfIn PDF document text
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/911af.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/ibjdvpP/37877027747.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/sifipo.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/8696fcb651b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zodumokosijupe.epizy.com/what_does_ou_mean_in_optometry.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_a39bd199b891405a87967b7873ac8b84.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_9a04864dc18c47759479b8b068a053d3.pdf?index=trueIn PDF document text
    • http://xadogugatu.epizy.com/inorganic_chemistry_notes_for_bsc_1st_year.pdfIn PDF document text
    • http://tavopaku.rf.gd/97724664721.pdfIn PDF document text
    • http://texomonimumoxeb.rf.gd/database_tutorialspoint_free_download.pdfIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_83058946039f4d44bdfcc6a6b485114e.pdf?index=trueIn PDF document text
    • http://lajopagi.rf.gd/tincion_de_placa_dentobacteriana.pdfIn PDF document text
    • http://rukanaka.epizy.com/modern_industrial_organization_ebook.pdfIn PDF document text
    • http://bafemiw.epizy.com/bts_riyadh_concert.pdfIn PDF document text
    • http://katezoluvezile.epizy.com/aboriginal_language_map.pdfIn PDF document text
    • http://bigobawavelig.epizy.com/riworoxifesiwefa.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_off00024435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24435 5100 bytes
SHA-256: 6bd5c080e09b43c01ef77c23cf1a1fb3b2ac5a78919e8865e4e5f8cdb9bc8dd5
font_01_sfnt_off0002559b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2559B 11420 bytes
SHA-256: a120bc7a737ee3f4140fd705bb7a487865e5de6b56ed629fcd30c7b0b8031503

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