Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67ef9299ebdfe55…

MALICIOUS

PDF

69.1 KB Created: 2021-03-23 02:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c0a7641010f39172b1e4c27f0e24fc6b SHA-1: 7ff178d895ede9e031b60b86d879514047cde8a7 SHA-256: b67ef9299ebdfe55ca3b01801bb1a97cdb1dfdaaa8e53709678c7a9622a434b4
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://soxebez.ru/123?utm_term=subordinating+conjunctions+worksheets+for+grade+5 PDF link annotation
    • https://padixegidenu.weebly.com/uploads/1/3/1/1/131164435/5e50d.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/1392664.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/Un5nTjd/3086366240.pdfIn PDF document text
    • http://itactical.xyz/lufifukizexotinuduwitug6e91j.pdfIn PDF document text
    • http://cmb-accueil.com/pitru_tarpanam_mantra_in_sanskritf4aaj.pdfIn PDF document text
    • https://penaxixix.weebly.com/uploads/1/3/0/8/130813526/jedasagofipomasivar.pdfIn PDF document text
    • http://idealica-official-it.website/install_scansnap_s1300f3ncz.pdfIn PDF document text
    • https://vakejijumusefuv.weebly.com/uploads/1/3/5/3/135313512/puxotof_bobemunokaluv_fupuwa_lawuputamarabor.pdfIn PDF document text
    • https://cdn.sqhk.co/lopovekis/Pvxprhi/ant_beetle_scorpion.pdfIn PDF document text
    • https://xezagepu.weebly.com/uploads/1/3/4/9/134901129/mesexobitazen.pdfIn PDF document text
    • https://cdn.sqhk.co/godidudawat/a3hejaN/19398257795.pdfIn PDF document text
    • http://sarkife.site/how_to_determine_rebar_sizebwz31.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/c9bHjhe/23503766967.pdfIn PDF document text
    • http://citrus-fruit.space/3533220583232nfp.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/the_book_of_martha_octavia_butler_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_f25c0392a5bb4554909b7632ca2fe08c.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_1b354b253a4f49a49a450fef6b36e673.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_e81048a5c9df42498f527d268f3bd459.pdf?index=trueIn PDF document text
    • http://bokepomi.onlinewebshop.net/sejarah_bilangan_bulat.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_af8a928cf7a447a78ad2cb5d28ec0ab6.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_a023588a4e25456eb6f7d09a520ab482.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_12265455033a4dfc9df4b33157923bf0.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_093751984e1e4ce6acc294e445188f99.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_off0000cee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 5848 bytes
SHA-256: d6272473b85a41a7a145cfe093044f7f82297cbdac5a3d204f2f3b8682e8dc58
font_01_sfnt_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 10384 bytes
SHA-256: 3265b4da3280d848b6293491d36c0f3021e38e474c145874eed0156d116040c7