Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e7c63ead8193bb…

MALICIOUS

PDF

82.6 KB Created: 2021-03-18 16:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1c7e0b90c58258df3499fd2d865a47b6 SHA-1: 8d88c95175b39a767bcd0ea39de046ac234c008a SHA-256: 74e7c63ead8193bb37e2a1dafd8c31230d29f1a357befe531d1fb2b70b091598
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with one specifically mimicking a 'hssc clerk admit card link'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=hssc+clerk+admit+card+link+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382631/normal_6013b48ac3d8e.pdfIn PDF document text
    • http://reduslim-europa.site/jeep_wrangler_spare_partso9xm1.pdfIn PDF document text
    • http://wbigs.space/gijamelzy2cg.pdfIn PDF document text
    • http://tedesuvukifa.iblogger.org/acog_guidelines_retained_products_of_conception.pdfIn PDF document text
    • http://devgame.design/fototaledomepopunepuga6sonu.pdfIn PDF document text
    • http://xipelosowux.22web.org/basic_mathematics_for_economists_book.pdfIn PDF document text
    • http://remontnatali.ru/bakikamopovemusedim7b89a.pdfIn PDF document text
    • http://lynciguest.com/diablo_2_death_runeword_weapon07q5u.pdfIn PDF document text
    • http://vehicleusains.com/45274751993v3ilz.pdfIn PDF document text
    • http://bogplaktnc.fun/can_you_make_money_from_tiktok_videosam6ny.pdfIn PDF document text
    • http://winoorama.fun/80138647788i6jqx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451365/normal_6004bd3d99c01.pdfIn PDF document text
    • http://mestorating.ru/how_to_read_log-log_graphaluxs.pdfIn PDF document text
    • http://alcexpress1.xyz/la_perla_size_chart7cnil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_6025a826f091a.pdfIn PDF document text
    • http://latuha.com/wamasoludozanolepudu3o4kl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_5fd97d9798f71.pdfIn PDF document text
    • http://lozhobelir.space/begrijpend_lezen_groep_7_werkbladenwzfdu.pdfIn PDF document text
    • http://electorat.org/tone_it_up_workout_bands_youtube3w425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489609/normal_5fc69f68bb932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_a43ff40ff58147d8ae25367db0065898.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_a3f50d5edb224032b7c5736240534956.pdf?index=trueIn PDF document text
    • http://rugafisa.epizy.com/24068074853.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 5592 bytes
SHA-256: 05b642fddbbedad8aa964a04b7d678893befe955043262aa6f8c3dd5afac2732
font_01_sfnt_off00010172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10172 10920 bytes
SHA-256: 722d2af77b8f5bb7ac54dcc6a356e2de754bd4f6efb90e6dcfbd99ad113da366
font_02_sfnt_off00012707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12707 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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