Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75dba34b7179a0a…

MALICIOUS

PDF

82.8 KB Created: 2021-05-02 06:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 05b71bdd1f66b27d858a567961097f55 SHA-1: fcaa8217fe832a0c2662a4a235d045bbb62452d4 SHA-256: c75dba34b7179a0a110021ef75939ea72775647c01610cbe1240b7d233325182
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document body, though partially corrupted, contains references to 'Ps4 gold headset user manual' and 'wkhtmltopdf', suggesting a lure. Numerous external URIs were extracted, with several pointing to disposable hosting and potentially malicious domains, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=ps4+gold+headset+user+manual PDF link annotation
    • http://piwofoterif.sportsontheweb.net/xugudapizumajesebiligub.pdfIn PDF document text
    • http://abwaab.su/9613052868zidqf.pdfIn PDF document text
    • http://zumufufup.sportsontheweb.net/ninoruxu.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/analog_computer.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/kixawetaku.pdfIn PDF document text
    • http://deutschebank-meine.com/romeo_and_juliet_2013_hd_movie_downloady8etz.pdfIn PDF document text
    • http://mazafaka69pussy.online/falibe2q2t.pdfIn PDF document text
    • http://zoosalon.org/17857974870m9s4t.pdfIn PDF document text
    • https://cdn.sqhk.co/fomavulobet/KM8Awgi/kafopivulijemesejux.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/IwOhgje/ice_hockey_3d_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/ggdhjig/english_party_songs_list_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kubarevopew/6jdibhb/taxorukosanom.pdfIn PDF document text
    • http://fawaxifiwuzodil.scienceontheweb.net/succeed_in_ielts_speaking_and_vocabulary_vk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sitok/kuxegamaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c8a00d-5816-4c9f-a091-1cd7770e8067/best_place_to_buy_a_dishwasher_in_edmonton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed67850c-8248-4160-8342-96d50c5f6503/dell_printer_v313_printhead_error.pdfIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_21838abe701a4162817e342a3da1f525.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_8969c0822a5d4e52ab1b9b295c91a6ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/rifofu.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/50414866813.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_5ef85e03767a40d7aac468e4972e21c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a679ea6c-4403-4dbc-a5c7-d8f8910990f1/betagivote.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/89378084720.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/chemistry_density_word_problems_answer_key.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_2e97690f7a0942b4a335361f9a80f0d3.pdf?index=trueIn 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_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 5328 bytes
SHA-256: 3667ac99b975f9e19e15665f75ca6b086a7c34666b58cd0a1d4a9da24d580d8b
font_01_sfnt_off000118d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 10764 bytes
SHA-256: 189e247f468739210e41314fd9d16892c94d0834807aa85f148ffe80666c120a