Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4850a062f4e0938…

MALICIOUS

PDF

82.2 KB Created: 2021-02-22 05:35:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b3be25d96a86b84a345256a0dbdfc30 SHA-1: 5b149df49311824fc7c692a48bd81974a59c585b SHA-256: d4850a062f4e0938c8bf1877674b29a32cc4de530d1f622af1f83b09b28ae593
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 0.9991

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://seumenha.ru/wix?keyword=agptek+user+manual PDF link annotation
    • http://siondez.ru/bass_scales_and_arpeggiosg4z99.pdfIn PDF document text
    • http://livecopyrightverification.com/74973097823u0fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/z4Phavp/super_penguin_run_mod_apk_all_levels_unlocked.pdfIn PDF document text
    • http://freefire-gifts.com/el_principito_resumen_por_capitulosqbnv5.pdfIn PDF document text
    • http://idealsit.fun/bekhayali_status_female_version4mjzu.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/RVq30IV/programa_vida_saludable_sep_2020.pdfIn PDF document text
    • http://beautysale.site/pizanijipoxizelesuresur6vmp.pdfIn PDF document text
    • http://juilopkiretlo.ru/bose_cinemate_15_remote_control_not_working0df2z.pdfIn PDF document text
    • http://antonioit.space/bapajelaruwozigunilowimejtu6l.pdfIn PDF document text
    • http://italywom.space/79085182883en0gi.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/Y8vdtgs/baxaz.pdfIn PDF document text
    • http://all-gopro.com/average_salary_of_ethical_hacker_in_usa523s9.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/fjjiagd/71820942966.pdfIn PDF document text
    • http://letnesil.xyz/pevonabudodo9dolh.pdfIn PDF document text
    • http://varuvoruva.iblogger.org/most_beautiful_flowers_pictures_free.pdfIn PDF document text
    • http://italystore.pro/tiwajibikubipodotafig03zs.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/gSie9ih/word_wizard_crossword_solver.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boribasumagit.epizy.com/13926917026.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/bike_game_car_game.pdfIn PDF document text
    • http://talujef.rf.gd/sotopusajofidaxaribinoler.pdfIn PDF document text
    • http://vomoguzidazufi.rf.gd/abcd_2_chunar_instrumental_ringtone.pdfIn PDF document text
    • http://mizotafadoroze.rf.gd/get_current_access_token_facebook_android.pdfIn PDF document text
    • http://jelirasu.rf.gd/sezododitawe.pdfIn PDF document text
    • http://fufezexu.epizy.com/78688887157.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_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 5192 bytes
SHA-256: 00cac7fd6bb11e4e3da43ec824c792c3e4f1d2ac75fc7c778b69d52067537e4d
font_01_sfnt_off000116ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 10660 bytes
SHA-256: b51403f87f6021f2eae132c6db9d98815f7a713ded146bc21c518649f788735f

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