Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c7d60bdcdffc92…

MALICIOUS

PDF

85.8 KB Created: 2021-03-08 08:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5ed8a40e412bf4b90c1425feeefaad6b SHA-1: 490f4ec200e95c2f91bcf74079174901001cd733 SHA-256: 10c7d60bdcdffc923f84bf98be68c6748bb7b9bbb0d3a5f0f7a93bf6c624fba0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. ClamAV detection and ML classification confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://botokaw.ru/strik?utm_term=what+is+unity+gain+bandwidth+definition PDF link annotation
    • http://sevotapapi.22web.org/educational_psychology_doctorate_entry_requirements.pdfIn PDF document text
    • http://hristogrigorov.com/516577987466bx3o.pdfIn PDF document text
    • http://idealicait.website/36571986556mrwhk.pdfIn PDF document text
    • http://wawepeb.22web.org/what_are_the_5_love_languages.pdfIn PDF document text
    • http://povar2020.site/14748884127ox6vk.pdfIn PDF document text
    • http://nigasheff.xyz/81007416248w8xv3.pdfIn PDF document text
    • http://xanimupa.22web.org/the_promise_secret_garden_sheet_music.pdfIn PDF document text
    • http://gusanod.22web.org/samsung_front_loader_error_code_se.pdfIn PDF document text
    • http://sendgrid-de.com/paxeruvelixot5xfj9.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/giJrRtN/73968263556.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/igjijb6/rose_blackpink_wallpaper_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/tawunipufop/GhjijOV/zudibezipa.pdfIn PDF document text
    • http://donbetosstreettacos.com/berirorizeza4l86d.pdfIn PDF document text
    • http://usacreditmonitoring.info/marlin_model_60_stainless_steel_scopeksj3y.pdfIn PDF document text
    • http://resimpub.com/wef_world_competitiveness_report_2018a8wnl.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/el1RJ0q/pinball_fx_2_free_download_for_windows_8.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/ihFRFTl/monster_jam_steel_titans_2_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wobosososozase.epizy.com/westinghouse_tv_32_inch_wd32hl1218.pdfIn PDF document text
    • http://pelidotuxige.epizy.com/15872004447.pdfIn PDF document text
    • http://dumudolaba.epizy.com/xadarusuvakamelizotida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69189fc6-0c06-472b-b726-8e7dbfac2f96/hidden_object_printable_puzzles_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f46367-9bf4-4fc5-b620-7d06f9d681bb/how_to_fix_short_cycling_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a8f937-a328-408b-8b35-fc6095761739/brother_ls_2125_price_nz.pdfIn PDF document text
    • http://nalirabagetovop.epizy.com/vizio_sound_bar_subwoofer_setup.pdfIn PDF document text
    • http://guxovoxed.rf.gd/almudena_cid_libros.pdfIn PDF document text
    • http://texatopewewew.epizy.com/8601111556.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 5388 bytes
SHA-256: 98b0161c23fac26deeac598cbcb05ce9926ea34e23506c310bf097b6e1de0516
font_01_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 11752 bytes
SHA-256: c643ad7c35f06e6eb98b860ac52c7e7f631a26773de7ef08ed8e984856ddabbd
font_02_sfnt_off000123e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E5 16256 bytes
SHA-256: b07ce0aada95f95d96e84e19ef57d5d7cd7bbd02f263e018bb21daeaafae3da1
font_03_sfnt_off00013962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13962 6084 bytes
SHA-256: fabec606e516cf69f6dec6919936ba93b659fa13295e205095b57fc70665da06

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