Malicious PDF — malware analysis report

Static analysis result for SHA-256 f653a4afbbdec413…

MALICIOUS

PDF

82.3 KB Created: 2021-06-05 04:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a9c500c185d12c255e17f95b9fd0a3d SHA-1: a5f01f21062eef306bf6677437a8d73e4a3662f6 SHA-256: f653a4afbbdec413930af7e08bd3c7d85fb4b326b3935d7da048822888a1afe1
136 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it's a password-protected archive lure, suggesting a phishing or social engineering attack. The embedded URL points to a domain that is not confirmed benign, and the document's metadata suggests it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://allytemp.ru/pbw?utm_term=star+wars+battlefront+2+single+player+offline
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/bagiwerimini-lolegolo.pdf
    • https://mepanegeloja.weebly.com/uploads/1/3/4/7/134759112/dewik.pdf
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/nugobeniwubavezuliru.pdf
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/6341737.pdf
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/8910266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pudamalulera.pbworks.com/f/kakulejozezuko.pdf
    • http://zuvuzut.pbworks.com/f/63267227422.pdf
    • http://wufamazajo.pbworks.com/f/cisco_networking_essentials_checkpoint_exam_answers.pdf
    • http://welomobo.pbworks.com/f/total_knee_replacement_rehabilitation_exercises.pdf
    • https://uploads.strikinglycdn.com/files/efc60c54-3763-49df-b926-846eb46439f5/rekovajuvikefekogafe.pdf
    • http://nusuwoxub.pbworks.com/w/file/fetch/144414234/anlisis_del_cuento_el_otro_yo_de_mario_benedetti.pdf
    • http://muxopal.pbworks.com/w/file/fetch/144444999/create_a_1040_schedule_c_form.pdf
    • http://wuranosa.pbworks.com/w/file/fetch/144414639/skyrim_how_to_use_cbbe_bodyslide.pdf
    • http://tagexoba.pbworks.com/f/good_drinks_at_kung_fu_tea.pdf
    • http://gozuwef.pbworks.com/w/file/fetch/144497625/71178977831.pdf
    • http://sewafebi.pbworks.com/f/fast_and_furious_1_full_movie_download_mp4_in_hindi_300mb.pdf
    • http://nubuzefi.pbworks.com/w/file/fetch/144553626/mupazetubojezexe.pdf
    • http://suniger.pbworks.com/w/file/fetch/144635061/51232974887.pdf
    • http://sinorodolu.pbworks.com/w/file/fetch/144444738/76498933440.pdf
    • http://fadoposapat.pbworks.com/f/juzozataxarigawitelet.pdf
    • http://mujusevo.pbworks.com/w/file/fetch/144456660/what_are_the_key_elements_of_a_script.pdf
    • http://komogabovuwa.pbworks.com/f/56924118674.pdf
    • http://kufujibumufa.pbworks.com/f/how_to_program_my_universal_remote_to_my_samsung_tv.pdf
    • https://uploads.strikinglycdn.com/files/e4478362-e7fd-47ba-980c-250b65a3f1c4/vw_service_specials_durban.pdf
    • http://pobonagul.pbworks.com/w/file/fetch/144608190/ketajivezokej.pdf
    • https://uploads.strikinglycdn.com/files/865d785d-ca1e-4370-bbd3-1539fcb34ea3/hermle_451-050_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/1bfb634f-8f75-48d0-b1f0-1788410ddd06/pakedir.pdf
    • http://mogulazedub.pbworks.com/f/how_to_save_wifi_passwords.pdf
    • http://xizisimavi.pbworks.com/w/file/fetch/144605139/56990266345.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a5.bin
1057ad4201a9df7c88a2a8e3fda464564092ee0d5a4fbf5d44d65eb790f17aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 5636 bytes
font_01_sfnt_off000116fd.bin
71a337b6654dc919659b2a1a04c8b6c98b96183abb9d5aac676dbbbab95567f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116FD 10552 bytes

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