Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f36aa0db3feb6b1…

MALICIOUS

PDF

74.7 KB Created: 2021-05-07 09:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 49a4509c269a5c624dfcc272c0953014 SHA-1: 81e5352106f5920d8e087a8028e01b58c69b0396 SHA-256: 1f36aa0db3feb6b19cee9b4ca52d3287866fe25cb6c494d2ead3c3fbf065894b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'botokaw.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=is+ahsoka+canon PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377371/normal_5fd06a07b2de2.pdfIn PDF document text
    • http://formulamoney.top/65316495529b02tw.pdfIn PDF document text
    • http://ersoil.fun/kaxovazagumipedexegiwavipdk16d.pdfIn PDF document text
    • http://monubaz.iblogger.org/what_is_meant_by_woe_is_me.pdfIn PDF document text
    • http://werewov.22web.org/desonutinisofobagew.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://romeoplanet.club/charlie_and_the_chocolate_factory_musical_willy_wonka_song1jjrs.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/ruvez.pdfIn PDF document text
    • http://mujizitodosi.22web.org/jopafabazejonakufuboro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_600ce34978c11.pdfIn PDF document text
    • http://sokolov.fun/ice_cream_sandwich_delivery_los_angeles8hcm2.pdfIn PDF document text
    • http://tepafuvofes.iblogger.org/disneyland_california_adventure_park_map.pdfIn PDF document text
    • http://feelslike35.com/542006685133ej0y.pdfIn PDF document text
    • http://astrology-personal.online/the_odyssey_part_2_answers1hj3o.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/faf612a7-f2ca-467b-be0e-b18410bf6928/rapavedusu.pdfIn PDF document text
    • http://segegasagemoxi.rf.gd/passport_renewal_ds_82.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8264c024-715e-46a2-b284-088ff3c9eba3/bodimupopezapixevetem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d251e5d9-e18c-41e0-84b6-d8c8540ee226/somewhere_over_the_rainbow_lyrics_wizard_of_oz_musical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f09609-6a00-4333-bacf-55ffea21725e/1719194595.pdfIn PDF document text
    • http://parubixus.rf.gd/genie_excelerator_spare_parts.pdfIn PDF document text
    • http://takidodaw.rf.gd/fizabivizedam.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_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 4760 bytes
SHA-256: 00cc48f2ba6f44879603e4318c3b1a74ab5f273c455f79a3ebd8f79fc4a35dfc
font_01_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 10888 bytes
SHA-256: 3849628d0299007997dc26ab0a50152d00baa798e063c80d7a6a13c9b85efcda

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