Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b923e0c51afdca…

MALICIOUS

PDF

84.7 KB Created: 2021-05-02 05:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bb29396072552a5b90cdd6b7a2644763 SHA-1: b94ea00411f3b23115122122bc9737d98776f41f SHA-256: 46b923e0c51afdca207df8a860e2bcb7df63e63fcc5ff4fbe6db65648355bb4d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/strik?utm_term=the+book+thief+full+movie+free PDF link annotation
    • https://cdn.sqhk.co/semiwewedazi/ihEhhjl/45748006851.pdfIn PDF document text
    • http://itagreen.fun/17722360275jk3p3.pdfIn PDF document text
    • http://regvoolkim.website/coloring_sheet_for_kindergartenez0g1.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/8w7je8j/grumpy_cat_memes_halloween.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_6032fad302f71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447884/normal_5ffe18e528d3e.pdfIn PDF document text
    • http://nashremont.site/mi_planta_de_naranja_lima_resumen_del_capitulo_2mlyjd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_60138d3c3fc5c.pdfIn PDF document text
    • http://reduslim-ordina.site/behringer_pmp2000d_manual02laf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470035/normal_6000b3197f4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_604218eb98662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5fe8967731cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fff7b45a2b87.pdfIn PDF document text
    • http://alcozerox.com/dog_man_book_3ffa5t.pdfIn PDF document text
    • http://ruszaimclub.ru/parrot_minikit_with_bluetooth_speakerphonel120y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_603c87816c440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_6013189df2454.pdfIn PDF document text
    • http://bcipreactivaperu.com/harcourt_math_workbook_grade_30ndde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_60309b9abbf6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5ffe99422b424.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
    • 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_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 4608 bytes
SHA-256: 20b19fe892d58b5c423c74104d5105205a96454302a7e857aa20676f2872afcc
font_01_sfnt_off000110c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C3 11236 bytes
SHA-256: 91967a91b273e66308b9f58d335ca81f5367bf320ed3249a4bf8f66a7d9670cb
font_02_sfnt_off0001370c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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