Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7c59daed4c3ad1…

MALICIOUS

PDF

123.2 KB Created: 2021-04-01 17:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 22d0a632ea7c21a7416a31ea94497e5c SHA-1: def8040330da8d1656fd9ced1b6ce5db6d12a9a1 SHA-256: ee7c59daed4c3ad1557c3e5c028c18a2794fd1aaf09bec3f3fd0ba1e1cf0ec23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall heuristic profile points to the document being used to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/award?keyword=mrityunjay+novel+pdf+in+marathi PDF link annotation
    • https://cdn.sqhk.co/jizapamilizo/lmAjizC/free_online_dictionary_app.pdfIn PDF document text
    • http://megalit-korolev.ru/8915440395qbfkg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_601bb3fb3e8f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fd7d6441f040.pdfIn PDF document text
    • http://lienforkid.com/delete_recent_files_windows_109oisu.pdfIn PDF document text
    • http://load-bcp.com/31105030435z6we5.pdfIn PDF document text
    • http://tradebot.space/taurus_millennium_g2_9mm_handgun_reviews30b00.pdfIn PDF document text
    • http://springtea.space/how_do_i_set_speed_dial_on_nec_dt300wy85n.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/jCvElhf/pm_awas_yojana_form_rajasthan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd5fac41b6e9.pdfIn PDF document text
    • http://zavodtriumf.com/solelexademezuvipabexan57h7.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/how_do_i_know_if_my_carburetor_is_rich_or_lean.pdfIn PDF document text
    • http://homiak.fun/samsung_ht-h5500w_hard_resetkw130.pdfIn PDF document text
    • http://jakufodunod.getenjoyment.net/jafijavupi.pdfIn PDF document text
    • http://sodahub.pro/2005_jeep_grand_cherokee_laredo_wheel_bearing_torque_specs85vhd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fe7a160dc822.pdfIn PDF document text
    • http://domastmsk.space/1491172025d4p50.pdfIn PDF document text
    • http://euromarket.pro/soul_hunters_wiki9o9z2.pdfIn PDF document text
    • http://neuroncraft.online/how_do_i_turn_off_demo_mode_on_sony_bravia_tv_without_remoteib49m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://duvodix.myartsonline.com/divuwanobak.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/asmaul_husna_anak.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6A 5344 bytes
SHA-256: 301466cf93b907c5e2c670a12d7db54b391cb87d2d796f1bd5100fd2a8d5f8b6
font_01_sfnt_off0001708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708C 11200 bytes
SHA-256: de5ac42339e5382724be93b4178125246ed66350e107926060fdf238744f75ad
font_02_sfnt_off000196c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196C5 16288 bytes
SHA-256: db4e45a70b1cfcb77a7241fd91d80e1754308e21df92433f867329a20837d491
font_03_sfnt_off0001ac71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC71 17032 bytes
SHA-256: 3bb765ee23b0e669499d253329b92a3ff93d39513db61ce9db26c1cb884d570b