Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f0b6fe14d81e35…

MALICIOUS

PDF

77.6 KB Created: 2021-03-28 13:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d94f2fedcb768d96886f949d9224c1e7 SHA-1: d64ca4f1aeeac9a107b7b04e18435e84cb2344d4 SHA-256: 15f0b6fe14d81e3587c73cf134d8473714b15ebdabeb25e62cc4bc0d67d902d5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a deliberate attempt to obscure the final destination, likely a malicious site.

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://zajinet.ru/award?keyword=que+es+anabolismo+y+catabolismo+pdf PDF link annotation
    • https://cdn.sqhk.co/nisugavu/YCfaDhh/petezekelozubuzivap.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/tapujodafif.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/tamil_pulavargal_history_in_tamil_language.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/gcgiVmv/90672578839.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/tid8hhc/tractor_pull_fails_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/IVjHgh1/smithsonian_channel_app_samsung_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/jgMCSjh/33144259050.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/a_grief_observed_cs_lewis.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/ggiXFhb/3485674415.pdfIn PDF document text
    • http://strapslap.online/fantastic_beasts_screenplay_read_onlinehxn9k.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/ZJY5gOV/cloud_raiders_apk_hile.pdfIn PDF document text
    • http://busivel.xyz/bilumaviriwus.pdfIn PDF document text
    • http://austritkfa.com/nivoturisi30f02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_6007b6cdc7561.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/9Qhawif/blood_pressure_readings_explained.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_60296c79987ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_6040bfc2cff26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_6055ffd525e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_603d467b8c46d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogosugo.onlinewebshop.net/bams_4th_year_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733cb567-774c-4d08-b93b-1cd11e22a76c/why_did_my_verizon_remote_stop_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b78fab-6640-47c0-8cc7-d4671bde5390/la_sombra_del_viento_pelicula_completa.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_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 5508 bytes
SHA-256: 91bcfcda537125953c6f51b00c64900b5c8d95097e0eaf0738348bcb9ded0a50
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 11960 bytes
SHA-256: 092b703434832726067a2466254046981d81b5e2b6ba456205749a1bda7ce7cd

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