Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bca37ef67170977…

MALICIOUS

PDF

74.2 KB Created: 2021-03-27 17:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ea4f5337e5b801727f03bb295bb8ad SHA-1: 7e971bb7ca0d5430be6f43dd68404e46097a0480 SHA-256: 8bca37ef67170977066c3b0471969386bf1cfd695cc13c553e11d82e8d4f7ace
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are likely used to host or redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=cartoon+wars+hacked+apk+download
    • https://cdn.sqhk.co/famagafe/n7GejhF/luxuputizonazatojamamil.pdf
    • http://hookup756.fun/jojogarutuobc2c.pdf
    • http://gtomishebs.xyz/550913620112g9yw.pdf
    • https://cdn.sqhk.co/ximirujusuxo/jchbjgd/darkest_dungeon_gameplay_review.pdf
    • http://antonioit.fun/49132293717vafzp.pdf
    • https://cdn-cms.f-static.net/uploads/4409103/normal_600f77b1c8c8a.pdf
    • http://powajaxib.medianewsonline.com/epson_v370_perfection_flatbed_scanner_argos.pdf
    • https://cdn.sqhk.co/wejewenu/lahagco/nhl_prediction_today.pdf
    • https://static.s123-cdn-static.com/uploads/4481820/normal_5ffac7af6b758.pdf
    • http://mavitrade.com/how_to_help_a_child_with_emotional_trauma5qn0f.pdf
    • http://xiwupulo.medianewsonline.com/difference_between_aids_and_hiv.pdf
    • http://instapriz24.online/99974568341wz69e.pdf
    • http://dabopoxele.getenjoyment.net/netbeans_java_gui_builder_tutorial.pdf
    • http://reduslim-buy.site/magnitude_of_the_force_of_static_friction_calculatory225x.pdf
    • https://cdn-cms.f-static.net/uploads/4476127/normal_6041a80760227.pdf
    • http://mezajozugabaso.getenjoyment.net/68093404880.pdf
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5ff531471fdd7.pdf
    • http://niwadeg.mywebcommunity.org/anamnesis_clinica.pdf
    • https://cdn.sqhk.co/dovewobojeb/Riemlku/84991149186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jaminuzifibe.onlinewebshop.net/chokher_bali_free_download.pdf
    • http://levapoloj.onlinewebshop.net/jenita.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fe.bin
46f9161a999eecf442697b31eaebb5949a539f0cee49daf4e823bc54deadbe91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 5220 bytes
font_01_sfnt_off0000f5c4.bin
ad56f3cdf2f27d6e427c48beb3729a1ebafde5a4d8aeb2c0ec7ae99c8698e89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 10908 bytes

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