Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c3b86af46315e7…

MALICIOUS

PDF

81.5 KB Created: 2021-03-23 22:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91265588ab1c482afcbf753996709a5e SHA-1: b67463deed8d14d6e71375bcad74b2b3fa299454 SHA-256: 87c3b86af46315e7af20c92045ee38f9a3b82b8587f0e7a69795cd04fb760cc3
136 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The document body, though heavily obfuscated, contains text related to software cracking, aligning with the phishing lure heuristic. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nipisod.ru/strik?utm_term=propresenter+6+crack+%2526+license+key+free+download
    • https://cdn-cms.f-static.net/uploads/4413973/normal_60415f13af683.pdf
    • https://cdn.sqhk.co/fosojatesog/a0gcMy4/30261783147.pdf
    • https://cdn.sqhk.co/rilowikapaz/jhiKhf7/naam_apna_song_download.pdf
    • http://sunipemumax.66ghz.com/ketogenic_diet_plan_australia.pdf
    • http://femetorisufi.sportsontheweb.net/relipis.pdf
    • https://static.s123-cdn-static.com/uploads/4407552/normal_6008c89f0aa88.pdf
    • https://cdn.sqhk.co/tubafejog/gjdhbjj/chick-_fil-_a_menu_nutrition_information.pdf
    • https://cdn.sqhk.co/kavuzoda/bhjnrgd/67127949170.pdf
    • http://vexezujuzas.scienceontheweb.net/bangla_books_free_download_sites.pdf
    • https://cdn.sqhk.co/xoguvamev/igja5ja/nelanuzatod.pdf
    • https://cdn.sqhk.co/kojetovukufo/gicEbih/download_cinema_tycoon_mod_apk.pdf
    • https://cdn.sqhk.co/fawabanof/TOUC6KY/bathroom_radiant_heaters_wall_mounted.pdf
    • https://cdn.sqhk.co/xopuwomu/7dNA2gc/85108966630.pdf
    • https://cdn-cms.f-static.net/uploads/4482631/normal_5fd33a336e24a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nosigegu.onlinewebshop.net/jeu_de_cartes_spiderman_solitaire.pdf
    • http://dowijasimenazo.epizy.com/insect_pinning_guide.pdf
    • https://s3.amazonaws.com/rizijubovapuk/9274747503.pdf
    • https://s3.amazonaws.com/tabobujimo/basketball_offense_plays_for_youth.pdf
    • http://pakoxerevigere.epizy.com/307112253.pdf
    • http://gekobilewubu.rf.gd/23544641359.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/most_defining_moment_meaning.pdf
    • http://benipibidi.rf.gd/liste_adjectif_qualificatif.pdf
    • https://s3.amazonaws.com/juliziwojatige/17022365204.pdf
    • http://jemukiguwuw.myartsonline.com/regelakejukivuwaxe.pdf
    • https://s3.amazonaws.com/jarawaxanivu/rearrange_pages_online_sejda.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010203.bin
48c3918109d310cb789be94015857f4cf83db0d4b28ff9c317f4f665f10f0ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 5112 bytes
font_01_sfnt_off00011379.bin
622a1b2a67e9611b097de3007cadb6f1c7434b5621fa1ae8bd0b53fb8af060dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11379 10896 bytes

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