Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ff6b91f23e6776…

MALICIOUS

PDF

80.3 KB Created: 2021-03-03 14:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a67b4fdb41a8ed8c2441071a859f23a6 SHA-1: da54aa145850d44494d93ef919bb9a5bc7fa73af SHA-256: 06ff6b91f23e6776ddfee8df49f9b7c1f21fa62fe0de0de7d5cf9daf80c1a926
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The document body, though partially corrupted, references 'Harry Potter' and 'wkhtmltopdf', suggesting a lure. The presence of numerous external URLs, including one pointing to 'botokaw.ru', indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=harry+potter+e+la+pietra+filosofale+libro+prima+edizione+inglese PDF link annotation
    • http://tijudozi.scienceontheweb.net/tokyo_ghoul_re_call_to_exist_character_customization.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408587/normal_5ff491b8440f2.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/hbdFghu/19910828598.pdfIn PDF document text
    • https://cdn.sqhk.co/reromiwo/7nhisgc/baby_i_m_amazed_by_you_lonestar_chords.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/44338316082.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/cKifo1x/48980133986.pdfIn PDF document text
    • https://cdn.sqhk.co/fudixaxogub/dc2ighi/wwe_network_live_stream_24_7_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_60129b4e87229.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/faputet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_601a2fc4d9da3.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/el_coronel_no_tiene_quien_le_escriba_teatro_entradas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5fc7ba0b0db0e.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/rowidagenerafunukanaraj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigapenegig.atwebpages.com/2006_bmw_330i_rims_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/what_is_non_woven_interfacing_made_out_of.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/38236134031.pdfIn PDF document text
    • http://pujumek.myartsonline.com/5832250301.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/incident_accident_death_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/lange_qa_psychiatry_download_free.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_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 5616 bytes
SHA-256: 17589aedf25068d6ed51cf9319bd63a77e750cd6418be4b59102e7ce219a1b93
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 11308 bytes
SHA-256: effb49eec89ef95274f7d03e4c35e67773443b42e1a29c42a0af0bd733651dfd

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