Malicious PDF — malware analysis report

Static analysis result for SHA-256 58282b299889aa98…

MALICIOUS

PDF

72.3 KB Created: 2021-04-02 14:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdff26a63e4224da6524e544647a2c64 SHA-1: 1e826c59184e639678c775a78a0a61068f39b31d SHA-256: 58282b299889aa981910f702f555bc212942f37b4a25ccdd5091dbed4873668c
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://soxebez.ru/123?utm_term=characterization+activities+pdf PDF link annotation
    • https://cdn.sqhk.co/worenora/hjhegd1/ikea_kitchen_cabinets_cost_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pevotido/K5hhjhh/xero_certified_advisor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5ff78dabf374d.pdfIn PDF document text
    • http://pearhaidhr.fun/jinja_load_templateoqs4r.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ibjbFhf/refurinunulilegogum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_604fa55093743.pdfIn PDF document text
    • http://connexion-amelii.xyz/homemade_frosting_recipe_chocolateg07c8.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/fMrrgev/50547543719.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/b95jcji/tiny_world_apple_tv_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/gjDbDoS/slack_download_mac.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/befovujatosesowam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5ff69429b4de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff58c5c3f0be.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/9810582928.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/udJifr0/quiz_bee_buzzer_circuit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagugitebuf.atwebpages.com/asciidoc_tutorial.pdfIn PDF document text
    • http://limixawur.rf.gd/16234907757.pdfIn PDF document text
    • http://pazosikubune.epizy.com/bsc_1st_year_books_for_free_in.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/corona_render_settings.pdfIn PDF document text
    • http://xagazusapikim.epizy.com/aghori_video_status.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_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 5224 bytes
SHA-256: 62106da47a0e597cc91f3a8fdd0282767091c44113f54f347066fbfb322c0e44
font_01_sfnt_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 9516 bytes
SHA-256: 51ea6f8ba618ad279288ac76d8f7d44732005f2bfda4fa9a405bfbebb76f76bb

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