Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c65c98322d4c29…

MALICIOUS

PDF

90.0 KB Created: 2021-03-01 18:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dad8c85a85b22312ecdc82c6ec1b8627 SHA-1: 5ea47170118259f38f913a7c22b85130ca98506e SHA-256: 71c65c98322d4c299577caf243ad1bc72ff644a2ee8f3e94d5fe3a52e5023ba1
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/wix?keyword=west+virginia+state+flag+name PDF link annotation
    • http://gejesixave.scienceontheweb.net/devufabedanitanunoza.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/wu_tang_clan_show_hulu_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzesowasu/cEiw3LF/boomerang_full_movie_tamil.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/sanalevijutekobo.pdfIn PDF document text
    • https://cdn.sqhk.co/raxulaxesob/gghi1ST/oscar_de_la_hoya_record_losses.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/1jcSGhi/age_of_war_2_unblocked_max_games.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/ralimit.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/gfhcajg/ates_ve_su_2_oyunu_oyna_iki_kisilik.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/bmw_x3_workshop_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fupuzujovo.epizy.com/new_moon_book_vs_movie.pdfIn PDF document text
    • http://medexode.atwebpages.com/how_to_use_bose_soundbar_remote_control.pdfIn PDF document text
    • http://meralilenizo.epizy.com/metodologia_aprendizaje_basado_en_proyectos.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/8395553740.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/sozoxifivumavogoxonix.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/tezuni.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/8698693987.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/vagulamusevavukitividuxo.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_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 5160 bytes
SHA-256: db329e7ad50a05e33cc1e0068914b88e139b481446fe1b6742cbfc8c775412f1
font_01_sfnt_off000136f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F0 10368 bytes
SHA-256: 59873917b0b85b7505900a65bf8658fb4f5841b2c9451c88a3ea6e20e6db55fc

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