Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d84f8fc1e54cd58…

MALICIOUS

PDF

82.0 KB Created: 2021-04-03 06:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ba74dbc99bec79417d97723ce860a851 SHA-1: 1b3fcd7f1f2d3304f56b4305683acadbe69f3bd6 SHA-256: 5d84f8fc1e54cd581af9f02db0ed325a04ee0c6b0d424db912c47b8e6ea7f539
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The presence of external URIs and a link farm heuristic further supports this, suggesting the document is part of a broader campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=seismic+data+processing+report+pdf PDF link annotation
    • http://revodegasiger.sportsontheweb.net/rawode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_6056d4e9d9bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_600d68a49ad39.pdfIn PDF document text
    • http://naturaitalia.space/najazumixuxitujjxral.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/beckmann_and_ling_s_obstetrics_and_gynecology.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/water_supply_sanitary_engineering.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486984/normal_6006ccdaa81bd.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/dDZmOih/tetris_99_pc_emulator.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/fgsjhhc/fabedidepunuwelabit.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/34393672798.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/bulk_modulus.pdfIn PDF document text
    • http://dmgameplan.com/timekipuxanuhq2s1.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/temporary_anchorage_devices_in_orthodontics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_602275a36cf14.pdfIn PDF document text
    • http://bukanugizini.mygamesonline.org/workout_book_with_pictures.pdfIn PDF document text
    • http://iclod.tech/how_many_calories_in_an_arbys_gyrofkf6v.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/lSTihia/deginogavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/pipovajowawosimaro.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/java_restful_web_services_tutorial_netbeans.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/zarojakozepameti.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/transition_words_in_spanish.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/aashto_green_book.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_off000102f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F3 5544 bytes
SHA-256: f2b37b739f5d78b9aaff57a6adb3ccce1dce8052d6a8fa0e46f55b5dddf81a21
font_01_sfnt_off000115b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 10868 bytes
SHA-256: 2853be474d8af72633c22cec1ecc379b056206af33f48a9c0df4ccc0b2284849

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