Malicious PDF — malware analysis report

Static analysis result for SHA-256 194406ebe5b544ab…

MALICIOUS

PDF

81.0 KB Created: 2021-03-02 02:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f3f888978831633d9f3af4aa65d4bb69 SHA-1: d72e2a5a7eeb6e299652e9deb469292587ed5f49 SHA-256: 194406ebe5b544ab072d58edb79d9febcbcbe1cdf35fc94b04bde962c0882aed
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, including one that appears to be a PayPal-themed lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of external URIs and the ML classification strongly suggest malicious intent.

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://jottigo.ru/strik?utm_term=ejercicios+de+gramatica+espa%25C3%25B1ol+online+gratis PDF link annotation
    • http://sis-paypal.com/67902674968aj73a.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/gjjhajd/sims_3_mobile_cheats_2018.pdfIn PDF document text
    • http://kyponnik.online/dopewisugaxipuwoloduith09.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/what_time_is_too_early_for_dinner.pdfIn PDF document text
    • http://purpless.vip/kazizuwuriwogetaxixatazf1zav.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/40207754031.pdfIn PDF document text
    • https://cdn.sqhk.co/kesusevuzep/f32jgcv/68579630519.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/939482768325bn61.pdfIn PDF document text
    • http://sibasijiv.22web.org/how_do_i_use_my_power_xl_pressure_cooker.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/harry_potter_2020_movie_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/G4jajbQ/43532855645.pdfIn PDF document text
    • http://lifeit.pro/sanapimorikabalewetukiwu9qag2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vorinemoxolupip.rf.gd/states_of_matter_concept_map_worksheet.pdfIn PDF document text
    • http://vuremekewema.rf.gd/chapel_house_surgery_formby.pdfIn PDF document text
    • http://furaxem.rf.gd/shooting_games_2019_apk.pdfIn PDF document text
    • http://xodupope.epizy.com/job_resignation_letter_sample_format.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6A 5636 bytes
SHA-256: 605c312030b6f39d0c37d83e9ccb92846e5a27202fc9c02efb1d81845ce4a40f
font_01_sfnt_off0000ef3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 1820 bytes
SHA-256: afc4792aae1fb5e73c8f99d53fcfda9082f2dc61c05424aefa6a3ba966172222
font_02_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 11404 bytes
SHA-256: b3a60d37585ffe0efe3f7b2d0925c9f4fdb8d34174cb959a21facef151848988
font_03_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 16224 bytes
SHA-256: 7a7e0f9cb89785dee93ecfbcc78ef93b5a18a5022886c2d5a0bf15d9412c15a0

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