Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ba3aed58785a6a…

MALICIOUS

PDF

78.8 KB Created: 2021-05-04 08:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: baa5c616a80fcd108841a13ad1ee274f SHA-1: 6f327658af489329e198fb68661534299d7eca24 SHA-256: c3ba3aed58785a6ad112965c7be4e4d637afc7714aabb027c1b59d550d63300d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically pointing to a suspicious domain ('jumiwimov.ru') that is likely used for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests that the PDF is designed to host a large number of links on disposable domains, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=what+triggers+vertigo+attacks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472764/normal_606d9110cbc36.pdfIn PDF document text
    • https://cdn.sqhk.co/wenisuvuroju/h4y2geR/amazon_prime_video_code_promo.pdfIn PDF document text
    • http://clipshd.design/best_type_of_septic_drain_fieldcmhfa.pdfIn PDF document text
    • http://fitademaluj.iblogger.org/how_do_i_find_an_ice_cream_truck.pdfIn PDF document text
    • http://profapp.pro/80388356681vctdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_60162bb4690db.pdfIn PDF document text
    • http://lesantyqas.online/can_you_keep_a_secret_20199jjv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460968/normal_600eb90a80763.pdfIn PDF document text
    • http://sun-italy.space/rulofexijanoke03nq9.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/sgfgghc/fortnite_dark_legends_pack_kaufen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385612/normal_5ffa67c3014be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6018440c54f0b.pdfIn PDF document text
    • http://levelupguild.com/wafefawuloworojedilopavhipp.pdfIn PDF document text
    • http://stopnutristrike.ru/gatonuwu137vb.pdfIn PDF document text
    • http://redirunna.xyz/32028510100fl7nq.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/gL3Xifj/kapofifi.pdfIn PDF document text
    • http://blue-tick-central.com/online_games_no_download_pczgf8r.pdfIn PDF document text
    • http://winwites.space/transformers_cyberverse_deviantart7k5p3.pdfIn PDF document text
    • http://guginegafofa.iblogger.org/97599918148.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/jaWErpw/jepitelurukisegofazowij.pdfIn PDF document text
    • http://busivel.xyz/63227910392vycwu.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/3V6gczL/antivirus_for_windows_8._1.pdfIn PDF document text
    • http://deemonatrafik.xyz/marla_maples_now_pictured05p4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zapulozamatuwe.epizy.com/pisezogivivatizut.pdfIn PDF document text
    • http://saretozegif.rf.gd/convert_to_word_converter_software.pdfIn PDF document text
    • http://jimubawemise.rf.gd/do_you_feel_what_i_feel_is_it_real.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_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 5168 bytes
SHA-256: d0ee6cf7e1c6dcf96e318392a2163af9739cc1811dacc7822ef8104ab173524f
font_01_sfnt_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 10480 bytes
SHA-256: 307eb8dcb85395f9ffcb0e0adbda3a9e6035776b426f6050c8d9d5a2f21f2caa

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