Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9edf243bec22952…

MALICIOUS

PDF

81.6 KB Created: 2021-05-14 17:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f0bd98a67d9d90a6c43f0afad7fd0917 SHA-1: dc55bf6570b108ab49d1e15dee0247973cc7560e SHA-256: e9edf243bec229529df8eddac2c14470646d10ae0f6fac48405d4ef56bef7c50
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'botokaw.ru', suggesting it's designed to redirect users to potentially harmful websites. The document body, though heavily corrupted, contains text related to resetting a bread maker, which serves as a lure to disguise the malicious activity.

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://botokaw.ru/strik?utm_term=how+to+reset+black+and+decker+bread+maker PDF link annotation
    • https://cdn.sqhk.co/sibamoxa/oSRgggi/lifeb.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/ic4xxgJ/world_map_quiz_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/Ciasih9/mikororovufubexefazuwosef.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/hgzZezn/words_in_a_pic_2250.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/67454331363.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/zgdXRib/22982516762.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/Hpf2yhc/lakofaxigijebetupadikubup.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/ahb48ro/82113555639.pdfIn PDF document text
    • http://cmb-societe.com/maya_vray_render_settings9qbo9.pdfIn PDF document text
    • https://cdn.sqhk.co/digatamale/gdjh6I2/29707617301.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/business_correspondence_letters.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/1PhijSW/tigaguwirobinitasufadut.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/ggg59ic/niwelagavukixivisesusekoz.pdfIn PDF document text
    • http://disconto50.pro/cooperative_federalism_examples_todayasnsb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegetebipa.atwebpages.com/girudixejopajetirotade.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/casio_ct_700_power_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/59389738712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02d9a4b-c3b4-4c3e-a8a0-72c98ae5d158/what_is_pinoy_pop_culture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c640cec9-8829-4aae-ae90-4574b76899bd/70551668217.pdfIn PDF document text
    • http://roveramo.atwebpages.com/rezubogusugi.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/assassin_s_creed_identity_mob._org.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/edipo_rei_historia.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_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 5344 bytes
SHA-256: 1c8a036171ed3804acd405b3bcef1bc1b0a21812b6a9db0bb9e61abf3bb95984
font_01_sfnt_off000111cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CF 11364 bytes
SHA-256: 6f1933f73f4a813f4df8ad1bc1e50eaea3cc81097888b3847e94686399f3719a

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