Malicious PDF — malware analysis report

Static analysis result for SHA-256 979fe1571c57365d…

MALICIOUS

PDF

81.6 KB Created: 2021-06-01 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e552257d9ca5c93973d87279358f1b3f SHA-1: 395a5680f8b45c54cf1a3f0914d7bfd1966f79a3 SHA-256: 979fe1571c57365d525ef9d3483d76c347c70f47c69933cd569158d65150fcdd
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning attempt. The embedded URL 'https://gimoguvi.ru/wb?keyword=what%20is%20dork%20diaries%20genre' indicates a lure to a specific search query, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wb?keyword=what%20is%20dork%20diaries%20genre PDF link annotation
    • https://jakikuxe.weebly.com/uploads/1/3/0/9/130968972/xumojegenoxex_kinoso_sedalis_powofetaketi.pdfIn PDF document text
    • https://kiwewogulexir.weebly.com/uploads/1/3/4/3/134307720/puwajujitag-naxap-nojiriv-tuwazikuxanaza.pdfIn PDF document text
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/nekokob.pdfIn PDF document text
    • https://xekobemakisusij.weebly.com/uploads/1/3/1/4/131438823/gazinaxegidigud.pdfIn PDF document text
    • https://genexopeg.weebly.com/uploads/1/3/4/6/134661587/rojesivatosi.pdfIn PDF document text
    • https://selikiwomutarew.weebly.com/uploads/1/3/5/3/135329437/temukuwi.pdfIn PDF document text
    • https://nafoxowozuvika.weebly.com/uploads/1/3/1/3/131383754/c0302bdba0f5f.pdfIn PDF document text
    • https://gakigabop.weebly.com/uploads/1/3/1/4/131406234/1504045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d8a3cd-5cc8-4d38-94fa-e8bcc32ad606/the_over_40_hormone_reset_diet_free_download.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/w/file/fetch/144437343/how_long_do_volume_lashes_last.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/xifijutibibegobikiw.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/f/gamma_sigma_chapter_of_kappa_alpha_psi.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/que_es_un_sistema_de_control_distribuido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36cbc2bf-d305-45c1-9720-481a6df738d2/videos_juegos_del_hombre_araa_en_moto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266c9900-6b5f-499f-ab2f-e3b95bafffc1/for_my_legionaries_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a586012-620e-47a3-9dce-36cdde093c39/apollo_twin_duo_usb_mac.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/w/file/fetch/144462876/21907502304.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/paypal_hack_apk_2020_no_root.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf17a14-dc66-4334-8243-d07a375f1972/what_to_give_my_boss_for_her_birthday.pdfIn PDF document text
    • http://fubajulak.pbworks.com/w/file/fetch/144426345/binocular_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2eae6b-72c3-456b-b697-e5e51253ba20/three_ways_to_persuade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41db8e2-1f7e-4e0b-a817-6bcfa0f22c0f/how_do_i_change_the_sensitivity_on_my_night_owl_camera.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418647/google_drive_jurassic_world_fallen_kingdom_mp4.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/w/file/fetch/144440511/bumokafasadokitogufumupef.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144427683/goblin_cap_1_espaol_latino_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf821088-46d7-47c4-8447-61f2dd0f1b2b/82041159110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3ffaa6-2525-4378-8dbc-f721cd2ab52c/game_one_piece_android_apk_offline.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_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 5132 bytes
SHA-256: b84b1b6ec8444a095106526116a927f41ee2a79b0d10c2c3d501e054ee5f0309
font_01_sfnt_off0001124d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 11528 bytes
SHA-256: 4c067d439f6d0b6f4fc2d0548f95980c9c0758b8cb13a14c29b2dcccec41e64b