Malicious PDF — malware analysis report

Static analysis result for SHA-256 919d48a83754f94a…

MALICIOUS

PDF

87.8 KB Created: 2021-04-10 05:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8c6d234b9c0b9dfdfa9b0cfb81586f1d SHA-1: c4383b48c8eefda6fcc628b4f97902139c30e310 SHA-256: 919d48a83754f94a20bcebcdad95da892fcca061cabdb39c9f395d73ea7f748e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=eventide+h9+core+effects+list PDF link annotation
    • https://majurunonixo.weebly.com/uploads/1/3/1/0/131070356/4747145.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/rawaguliwafiwila.pdfIn PDF document text
    • https://wovigapugup.weebly.com/uploads/1/3/2/7/132710676/mujis_bemavi.pdfIn PDF document text
    • http://smcjd.com/mapajuvivimoxosujodumgx2tu.pdfIn PDF document text
    • https://rewekofewu.weebly.com/uploads/1/3/4/6/134654248/xeludutilewisuk_sixami_watitejasuvofek.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/42903272034.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/ap_english_literature_multiple_choice.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/8NicJvB/50754693775.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/jdiNhiq/flower_mound_employment_agency.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/sociology_notes_in_bengali.pdfIn PDF document text
    • https://bopegaxuz.weebly.com/uploads/1/3/1/4/131406849/4495973.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/fjcghgi/wallpaper_hd_apple_black.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/86254678389.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/ighhikR/remix_songs_2019_gqom.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/048223d91ea.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/resumen_de_la_biblia_genesis_por_capitulos.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/hfgg2Ip/lost_echo_resonance_apk.pdfIn PDF document text
    • http://pixxel.life/jivaxagip2mbsp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zotubune.myartsonline.com/67654405907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb96910b-d174-4903-9d65-4732e0104b71/coleman_roadtrip_lxe_vs_lxx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a343cad-3636-4f9a-ad92-e960ca72cff8/dmlt_microbiology_notes_in_hindi.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/anatomia_do_nariz_e_cavidade_nasal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 4860 bytes
SHA-256: be3474a8cd875cedb6b881429e33b1853a1800cdf97452f99dbb38dc031a9c8c
font_01_sfnt_off00011bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB6 11704 bytes
SHA-256: 07df099d6997a96ebf5402a0b79c0d585eff758472591a267bf885678a90498c
font_02_sfnt_off00014393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14393 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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