Malicious PDF — malware analysis report

Static analysis result for SHA-256 3330dac9e7e6afe6…

MALICIOUS

PDF

80.7 KB Created: 2021-02-27 20:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2618aa62e2788db62719c6e989c72a5d SHA-1: 0705e00d75a7731d0c454ea123c05725a0f4d483 SHA-256: 3330dac9e7e6afe62efe06f36756ebeae87cd4153b39ba79c177f4d91078aac4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Dani johnson script book' and 'wkhtmltopdf', likely serving as a lure to disguise the malicious intent of directing users to external sites.

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://zajinet.ru/123?utm_term=dani+johnson+script+book PDF link annotation
    • http://zevewidojodot.mywebcommunity.org/common_core_standards_illinois_ela.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/290s7pY/g_stomper_studio_full_version_apk_download.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/what_is_the_plot_summary_of_alice_in_wonderland.pdfIn PDF document text
    • https://xuniruki.weebly.com/uploads/1/3/0/7/130739043/zopulogifotixizopet.pdfIn PDF document text
    • http://golixudib.mypressonline.com/how_much_is_a_soda_machine_worth.pdfIn PDF document text
    • http://proita.space/the_certified_six_sigma_yellow_belt_handbook_2nd_editionjs70k.pdfIn PDF document text
    • https://cdn.sqhk.co/xaveredero/dIagjge/good_road_trip_games_to_play.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/9086151.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/92379009729.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/jbu9Chi/nigemepeloromub.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/how_to_find_slope_intercept_form_with_2_points.pdfIn PDF document text
    • http://flylovel.com/aarti_songs_in_kannada_freepx6bm.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/kuxujis_zuxilopofogi.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/f0m04gh/spirit_airlines_stock_chart.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/who_am_i_ramana_maharshi_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/LihQcxn/79401793812.pdfIn PDF document text
    • http://helpcopyright-service.com/confidential_informant_list_for_my_citysk28y.pdfIn PDF document text
    • https://nateguwab.weebly.com/uploads/1/3/1/4/131453796/jabusatefun-tezikufuguletiz-sufamegijog-bowugerepasa.pdfIn PDF document text
    • http://physcoo.com/31560291687alacv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pulutugorivexek.atwebpages.com/zenuxov.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/lawometufowa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B3 5268 bytes
SHA-256: 3cd9a965ac8abeb980e40f02b8e22ff62791bd14e5315094edee75712d087250
font_01_sfnt_off0000f99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 11304 bytes
SHA-256: 0d2d6bc5974c8e030a6072a9d8744e8fa3714239aa0f4ef95124077d42865e31
font_02_sfnt_off00012081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12081 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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