Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced7e33fd5a18163…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 00:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f8ced815dc0708af8ea9dd5e045c3bb6 SHA-1: 99fa670cd5bcd1ec71a98ae174128575d0aa6b2e SHA-256: ced7e33fd5a18163dd2151ada4895491c6484e8f4373f5b893510a482f7bc3f2
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 employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and a link farm heuristic points towards a phishing or malware distribution scheme.

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://xezojetit.ru/strik?utm_term=ford+mustang+owners+manual+2019 PDF link annotation
    • http://esclick.pro/the_wolf_among_us_game_ps4spslx.pdfIn PDF document text
    • http://peskomment.ru/xanuviwokifekefoxuxile3iex4.pdfIn PDF document text
    • http://sacredname.ru/the_power_of_i_am_david_allen370fo.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/ggdgh5x/the_culture_code_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/Ct4haH5/66048223037.pdfIn PDF document text
    • http://zahlungsservice-ch.site/wedding_cake_baking_gamesk9q8q.pdfIn PDF document text
    • http://uggi-ugg.com/kamegebopul8egr2.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/ia4O1hb/cbse_class_8_maths_book_free_download.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/panasonic_viera_tv_remote_volume_not_working.pdfIn PDF document text
    • http://damita.fun/instant_pot_vegetarian_cookbook_amazonp152y.pdfIn PDF document text
    • http://avit0.cc/bass_music_player_onlinewaumk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461773/normal_60136417e7034.pdfIn PDF document text
    • http://lg-copyrightforms.com/338180783152lza5.pdfIn PDF document text
    • http://tamakar.xyz/helicopter_crash_california_2020y93z4.pdfIn PDF document text
    • http://hidver.com/3rd_grade_reading_comprehension_packetrm336.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogujigasad.onlinewebshop.net/how_to_get_your_permit_nyc.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/manual_de_dibujo_arquitectnico_francis_d._k._ching_gratis.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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 5676 bytes
SHA-256: d39023ac6b908bcc5befb700ac9928aa2dea2ca7bb403fa05b89fcd941a6aa02
font_01_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 10780 bytes
SHA-256: b0e7a1f830a948692a51f93632c16b6eea21de2830a28befd84d70bfcc73cfee

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