Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b754774518e07e…

MALICIOUS

PDF

77.5 KB Created: 2021-04-02 02:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cfa916a7581fab49a90da8aa66aeee57 SHA-1: 808e01cd33f3d21893b6fb94e08fc8d8bb69d5cd SHA-256: e8b754774518e07e63391c1d31f80560b5d9dd4334b256dbf0bde7c097f76633
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 0.9997

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/wix?keyword=forge+domain+cleric+gods PDF link annotation
    • http://robolab.one/proform_power_995_treadmill_for_sale9ewuw.pdfIn PDF document text
    • http://youtube-subscribes.com/yard_machine_26_ton_log_splitter_manualuukq6.pdfIn PDF document text
    • http://mivetys.xyz/58958504023pn3qp.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/KZ0bHhg/rigigejexobugumid.pdfIn PDF document text
    • https://jupoxoguji.weebly.com/uploads/1/3/4/0/134097256/daxes.pdfIn PDF document text
    • http://leafester.online/octavia_butler_wild_seed1r6uc.pdfIn PDF document text
    • http://appless.space/78630245381u98bt.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/2326165.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/3b6261e1.pdfIn PDF document text
    • http://firstflirts.site/ejercicios_notacion_cientifica_1_eso_con_solucionesfnd01.pdfIn PDF document text
    • http://straponartist.com/why_is_my_dyson_vacuum_not_chargingb3mfz.pdfIn PDF document text
    • http://intekzafast.online/bafapumukolaje1ul0w.pdfIn PDF document text
    • http://pihodze.com/how_to_get_xpath_in_android_appium1khn0.pdfIn PDF document text
    • http://vanlit.ru/best_stock_markets_to_invest_in_20202nskv.pdfIn PDF document text
    • http://magnitoli-2ekran.site/what_to_eat_for_detox_day121rn.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/idGjftg/26261061845.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/vunizi/47268998532.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/91266041082.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/76947390028.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/kofibirumobonitolila.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_off0000f451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 5216 bytes
SHA-256: 635928e493f7f91080cfca98ddba43d68b775a06f39b0b712bc8529175c3d5d8
font_01_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 10296 bytes
SHA-256: 1cc591b23bfe22ab76bef7f6439d97ec216e46c3475372d86d541c9dd73a5838