Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1429d88427acd3…

MALICIOUS

PDF

80.5 KB Created: 2021-03-09 01:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 32718666fb8c9fb0dc54eac88bc26de4 SHA-1: ce534d1953dd346d421ec77e3badf10c5f5c4e4c SHA-256: ca1429d88427acd367ca56e923edf626673a828619dda4489115484444a49b85
66 Risk Score

Malware Insights

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

The PDF document contains numerous external URLs, many of which are associated with link farms and disposable hosting, suggesting a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the document's deceptive title ('Fusionner pdf en un seul mac') indicate it's likely part of a phishing or malware distribution scheme, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://druttle.ru/123?utm_term=fusionner+pdf+en+un+seul+mac PDF link annotation
    • http://gdztut.com/sony_fs5_second_hand4h07f.pdfIn PDF document text
    • http://pusapev.scienceontheweb.net/what_is_the_meaning_of_tree_of_life_movie.pdfIn PDF document text
    • http://50off.pro/astrology_10199pn0.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/eijhgQP/pajexowobeg.pdfIn PDF document text
    • http://idealicaufficiale.website/40185392377jguy6.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/38866267993.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/emerald_tablets_of_thoth_doreal.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/683824408733mtsi.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/what_are_the_different_roles_in_scrum_process.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/futetabeligapeminufo.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/giKhjl9/super_smash_bros_ultimate_bomberman_playable.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/koboxabobegaseguga.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/62766103953.pdfIn PDF document text
    • http://lojasamericanasbr.com/1999_jeep_wrangler_owners_manual_downloadgw0l5.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/togefemozetibinev.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/mamiya_rb67_lens_stuck.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/english_literacy_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nedizilunok.myartsonline.com/how_much_does_the_army_corps_of_engineers_pay.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/19088317488.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/mind_power_seduction_manual.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/draw_lines_of_symmetry_worksheet_4th_grade.pdfIn PDF document text
    • http://batapijas.myartsonline.com/zorugipanilewovamigebu.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_off0000faa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 5256 bytes
SHA-256: b24fc96359aa68e99e6db0b0d6e9aab4523a49bd8a28598d3636846884a39e8d
font_01_sfnt_off00010c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6D 12160 bytes
SHA-256: b60bdab0b131cab163c2739a98bc6de2e611548bd53ca96da8e644f84f293b98

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