Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e22f10c25b7472…

MALICIOUS

PDF

78.4 KB Created: 2021-05-10 14:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7acff3eb235b47677f26ad0d9dff6225 SHA-1: 26c12dcd106c39761edd43694bd64fbedd725722 SHA-256: 55e22f10c25b74724d9fe4fb8af3209e18d41030b8d15d52aec66c6de74b5ff4
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://botokaw.ru/strik?utm_term=how+to+reset+toto+washlet+remote' indicates a lure related to appliance support, likely to phish for credentials or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=how+to+reset+toto+washlet+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383703/normal_60645b3b9ac6c.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/40500054866.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/hbijhee/42724797974.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/hgi1YZX/zelokudagudotusideda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_6063ba26ac3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_606583b781ab9.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/JG9i7hi/business_name_registration_form_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xasomegupur/jfjghit/green_ringtail_possum_evolution.pdfIn PDF document text
    • https://cdn.sqhk.co/laxuweredex/hhbijhD/lewuduwosoguratedidot.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/hAhd3VF/masokapebuxexele.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/Ogjjdge/superhero_ninja_kung_fu_fight_mini_ninjas_gameshark.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/gQiahdx/arrowhead_golf_course_myrtle_beach.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/dDjXjgc/61544088593.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/DkKdidA/walusejowexupizabeg.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/suxifalowuvulaku.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/ohajaie/billie_eilish_songs_in_order.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_602d84895c133.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/4y0ihn8/ice_age_nutty_adventure_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_6055110e8aadc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_231c4182e0fe40d08ea5d3889227b9a9.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_373facc11f7e43b9a68732053e7fd4f8.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/kotokiv.pdfIn PDF document text
    • http://moxixezegosa.onlinewebshop.net/diario_en_motocicleta_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/breathe_on_me_breath_of_god_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 4612 bytes
SHA-256: aeee48bab90cad57345947f29e354a98b8639fea44b2b0187843e55abcafb1bf
font_01_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 11508 bytes
SHA-256: f159691b634c19b97fe324ff91faa43235765deda02e650691b3b38c24536c9c
font_02_sfnt_off00011c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f