Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6e9514a2c44a5c…

MALICIOUS

PDF

72.3 KB Created: 2021-04-08 23:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c2281bb65ce88b6559f548c690dfbab2 SHA-1: 22cb6d0cf22a7d53a99aeb75fa6498f32db7fe6c SHA-256: 8e6e9514a2c44a5cb5c2516e1ccebc47384354ae41b02df98755e8c516a8d922
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://golowaki.ru/strik?utm_term=sentry+safe+combination+reset+code PDF link annotation
    • http://naturazuwedemoz.22web.org/bahubali_song_video_free.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/rivilivu.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/ruvijizoxusix.pdfIn PDF document text
    • https://tinedejoditof.weebly.com/uploads/1/3/5/9/135971312/wofigowamu.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/ziviwozifiririwupo.pdfIn PDF document text
    • https://cdn.sqhk.co/lezenelu/hhhdjdF/logo_quiz_answers_level_17.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ihyLij1/free_casino_slot_games_with_free_coins.pdfIn PDF document text
    • http://pibakulisup.medianewsonline.com/bruchrechnen_mit_variablen.pdfIn PDF document text
    • http://tixanijematewe.mypressonline.com/83601132970.pdfIn PDF document text
    • http://padojuputiki.iblogger.org/6802962873.pdfIn PDF document text
    • https://linugotozoluj.weebly.com/uploads/1/3/4/6/134662393/16e652e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewetanetoza.atwebpages.com/surya_arghya_mantra_in_telugu.pdfIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/47645261621.pdfIn PDF document text
    • http://tatasoge.epizy.com/adjectives_synonyms_and_antonyms_exercises.pdfIn PDF document text
    • http://zomumadunita.rf.gd/le_yield_management_dans_l_hotellerie.pdfIn PDF document text
    • http://xesufiwonelu.epizy.com/kowoxuwuvup.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/fundamentals_of_computer_graphics_fourth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/qual_a_populao_do_brasil_atualmente.pdfIn PDF document text
    • http://fazegujopazoj.atwebpages.com/variable_resistor_10k.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/81154438970.pdfIn PDF document text
    • http://masusoxowep.onlinewebshop.net/cdf_and_plot.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_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 5480 bytes
SHA-256: aa6d808e04eb7d287432e9ae2094a8cc0f2ab6afc15e12dfdeaa126e07756010
font_01_sfnt_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 10616 bytes
SHA-256: e165f1b6b4d65dfbbbc3212fd0c8ebdf3e72f907203e7d098740ddf74e6a5721