Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d747e9c35904ba…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 05:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cb7bf0fdabb89cac192c219671b7c7ed SHA-1: 237c73412664c88f30d79d9927ac35974cb0113f SHA-256: 48d747e9c35904ba39d0cc9462dbca06db3a3de8bf5ca44394b7e478abd792f8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a high-risk heuristic identifying it as a link farm hosted on disposable domains. One prominent URL, 'https://zajinet.ru/strik?utm_term=hp+8000+elite+small+form+factor+specs', is likely the intended destination for the user, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/strik?utm_term=hp+8000+elite+small+form+factor+specs PDF link annotation
    • http://depusapo.mypressonline.com/how_to_translate_arabic_to_english.pdfIn PDF document text
    • http://max-lifting.store/mxr_m87_bass_compressor_pedal_manual8k03i.pdfIn PDF document text
    • http://watogoda.mypressonline.com/70997935146.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/safemuzokos.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/nuzujenuwizawu.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/77858732906.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/pedoxipumubiderosipe.pdfIn PDF document text
    • http://geekcods.com/bride_and_groom_poses0dk14.pdfIn PDF document text
    • http://llloooodddd.space/crunchyroll_naruto_shippuden_episode_141_dubbed6k3zh.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/a_traves_de_la_biblia_notas_y_bosquejos.pdfIn PDF document text
    • http://oneitshop.pro/laptop_acer_aspire_v5_touch_screenoyk9u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejeseja/37469796427.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/how_to_install_myq_smart_garage_door_opener_chamberlain_myq-g0301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b187712a-6a62-4f8e-9811-52cd9de4cf23/tips_to_pass_aapc_cpc_exam.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_2c3f4157adc44f1589a76f798794f6bc.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_54e5a86df88e42c4890645efa9ab2fb0.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_e531d1e7e52f4e05b4bce24bf474eba4.pdf?index=trueIn PDF document text
    • http://bolirazebaf.myartsonline.com/how_much_annual_leave_do_i_have_left_calculator.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/dragon_age_origins_companions.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/saxamenug.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/93096732229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d702523-514e-4e7a-90af-148a6d1ff560/what_grade_is_a_2.9_gpa.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_154ce80456794e108afd7e5bce48a744.pdf?index=trueIn 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_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 5460 bytes
SHA-256: 141eb072828a507b4137d8044cfd43f256a66ec957fff4c0185d896b95a3b7b4
font_01_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 15184 bytes
SHA-256: 95283346f9fac9d2ba577b08801ee617e67b82b52a04a7610a5fdcac8399fc35

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