Malicious PDF — malware analysis report

Static analysis result for SHA-256 7caadb3378406751…

MALICIOUS

PDF

81.8 KB Created: 2021-06-09 13:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 078d555c199857da40503f03b9befdba SHA-1: 4c9a1e3de650c0dc75b08f24d1f21ba18acd1698 SHA-256: 7caadb3378406751648ad4850d198a1d4fd40b5ef7df9dbce04e6e885b6752e5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one pointing to 'philabc.ru', suggesting a phishing or malware distribution campaign. The document's structure and embedded links are indicative of a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://philabc.ru/pbw?utm_term=a+university+english+grammar+pdf PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4482002/normal_60b2874758b7d.pdfIn PDF document text
    • https://wenidudedovonoz.weebly.com/uploads/1/3/4/7/134721806/banefekul_dekup_dakoju.pdfIn PDF document text
    • https://zibufegorijalif.weebly.com/uploads/1/3/4/8/134889305/fafijunamemopani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_60373c3d396e3.pdfIn PDF document text
    • https://jemokufofek.weebly.com/uploads/1/3/4/3/134312150/5d60a18004.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/5b0079a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_605f36ab78a0e.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/datawomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_6055c99dd1da0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumedew.pbworks.com/f/55628509142.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144412410/81883983322.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/w/file/fetch/144474480/sowuwopikumuliratuxebide.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144565806/fixigivugasomeji.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/rijisixowojatenorejime.pdfIn PDF document text
    • http://gabumur.pbworks.com/f/30213567444.pdfIn PDF document text
    • http://tedadopite.pbworks.com/f/comparative_of_inferiority_exercises.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/f/67668409100.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/actividades_con_figuras_geometricas_para_primer_grado.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/f/22067944835.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144541533/who_are_the_main_characters_in_39_clues_maze_of_bones.pdfIn PDF document text
    • http://tiduxikuve.pbworks.com/w/file/fetch/144557595/botodabas.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144655725/29097114758.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144515838/rekevesukudikefude.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/w/file/fetch/144529422/doa_ruqyah_malaikat_jibril_mp3.pdfIn PDF document text
    • http://bidudilobofu.pbworks.com/f/sijoletovukuli.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_off000100c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 5608 bytes
SHA-256: ce7423fa4870e3236a9aa88f40287079abfba7edce2b849c250c96850ff44b67
font_01_sfnt_off000113b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B9 11568 bytes
SHA-256: 741bc422c298ba12069f082369b3088e31d837db71a09ec49b8c24eb94d60473

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