Malicious PDF — malware analysis report

Static analysis result for SHA-256 a356ae73480fa451…

MALICIOUS

PDF

93.2 KB Created: 2021-06-05 21:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2d2797c00a0d411821a57c9349502afd SHA-1: d6f8739309ab6d768b327a639ac8d5e5dfa3eba1 SHA-256: a356ae73480fa4516ee5d341ddb3612c9028d8e91dd5ecf022d77eb8181459d6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on a URL that appears to be a lure for downloading Canon drivers. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, and ML classifiers and ClamAV strongly flag it as malicious, specifically as a phishing or trojan. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://inwebjor.ru/pbw?utm_term=canon+lide+25+drivers+windows+10 PDF link annotation
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/kukanogo_demuvibof_xinapisepuzoma_givobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_601d12d0c3b96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5fdde1ee87c22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459055/normal_5ff30db4167b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428038/normal_6030d01d8e243.pdfIn PDF document text
    • https://zimavilagapiwe.weebly.com/uploads/1/3/2/7/132712623/mumegipubuj-fejuzij-tevizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_602fcf92446e7.pdfIn PDF document text
    • https://kazefapakoj.weebly.com/uploads/1/3/4/6/134644741/xudumejixox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://pamotekegopa.pbworks.com/f/what_to_say_for_1st_year_anniversary.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144587559/jolipujevo.pdfIn PDF document text
    • http://dewubuk.pbworks.com/f/attestation_dhbergement_exemplaire_la_banque_postale.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144412422/how_to_fake_a_doctors_note_for_school.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/mx_player_pro_apk_tv_box.pdfIn PDF document text
    • http://wisarazed.pbworks.com/w/file/fetch/144480447/fojow.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/f/20626240433.pdfIn PDF document text
    • http://litorabi.pbworks.com/w/file/fetch/144485646/73208859193.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144498954/is_doom_slayers_collection_worth_it.pdfIn PDF document text
    • http://pejokawigar.pbworks.com/w/file/fetch/144589020/rorutaxunesorowugekevu.pdfIn PDF document text
    • http://medodadepud.pbworks.com/f/ev_yapm_bir_parat.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/f/how_do_you_fix_the_timing_on_an_old_singer_sewing_machine.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/9_snf_kimya_3_nite_konu_anlatm_tongu_akademi.pdfIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144594288/buxonejevavumopaputakuli.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/f/is_totally_accurate_battle_simulator_free_on_switch.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/w/file/fetch/144631884/13949171018.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 4596 bytes
SHA-256: e80539876068d780ac7a1ee92f249e56d739a320ee3a1191d0ad46b37c31f5f8
font_01_sfnt_off0000fe0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 5328 bytes
SHA-256: 9c1eed9dab77cbe7833a0ff13f67bff611b020868bedc2f01e13edf0c4feeac9
font_02_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 6148 bytes
SHA-256: be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0
font_03_sfnt_off00012029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12029 16468 bytes
SHA-256: 279bb22e9b3d699a9188eb614dbfaec57cc66927aa28a83b18b2c47ca038af1f
font_04_sfnt_off00014d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6D 16684 bytes
SHA-256: a858ad06ee9285ef990c8ccf5509e6bce71cae8afc7f99ba8a1dcaf33198b628

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