Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2bb913125a1530…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 19:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9951bbad0fa644ebfd8d8e1c36bc4599 SHA-1: 716e27b402d4d6af1d063bf6b4d235eea71a8ad2 SHA-256: 7a2bb913125a1530bad7055b45f5f6228ede5f55328a9ad450bce8f1c043d6db
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/123?utm_term=self+guided+cycling+holidays+australia PDF link annotation
    • https://wikuxokogex.weebly.com/uploads/1/3/1/8/131872144/regijane.pdfIn PDF document text
    • https://nukawopuriw.weebly.com/uploads/1/3/4/3/134347541/nulevebizagum-xerijozapaba-zejenurivete-bizig.pdfIn PDF document text
    • http://fasadi.site/59856005343esy3u.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuxopova/hdhgxgg/pixitracker_pro_apk.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/fofofi.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/how_to_do_a_hard_reset_on_iphone_10.pdfIn PDF document text
    • http://subbellassecret.com/king_of_my_heart_guitar_chords_taylor_swifter40d.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/ammonium_sulfate_precipitation_table.pdfIn PDF document text
    • http://alcexpress3.xyz/togereffdwig.pdfIn PDF document text
    • https://kivasemav.weebly.com/uploads/1/3/2/6/132680863/8386344.pdfIn PDF document text
    • http://axecheat5.xyz/ftc_skystone_game_manual_1x755f.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/18gezWZ/3566447833.pdfIn PDF document text
    • https://cdn.sqhk.co/jakadamalate/iboijBD/football_tycoon_apk_mod.pdfIn PDF document text
    • http://tugrull.com/5892991548384dmt.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/KghKSmH/vonozabiturox.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/the_interpreter_of_maladies_setting.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/gghbSgi/rerase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufixis.myartsonline.com/biomass_briquettes_report.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/45983360300.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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 5488 bytes
SHA-256: 1090db787fb066ff8a4e15dcb8736ec54de76d76720723afc15937b0cf03009b
font_01_sfnt_off0000f917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 11472 bytes
SHA-256: d970558a206b8d97044007db386174261174af6067a3461df029783131ae0be8