Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b90a8f8589b70f…

MALICIOUS

PDF

83.7 KB Created: 2021-04-28 21:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 20df07ac053b642efcf903b328419cd7 SHA-1: df527a63d3e90d75e6b8651452b17df7621cf2fb SHA-256: d4b90a8f8589b70f5e95d1120425f5752d19df3b0bbe3e60ffa726e73f66c8fb
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains text related to a specific TV episode, likely a lure. The primary IOC is a URL that appears to be part of a phishing or malware distribution campaign, disguised as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=star+trek+next+generation+series+5+episode+19 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500893/normal_5fc5c46c65474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391909/normal_5ffc30bbd713b.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/713791.pdfIn PDF document text
    • http://gejikojaki.scienceontheweb.net/zovotedipujuveviliniven.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/32912093144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fffa29c98ab4.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/idHiji5/duxulagagazasoduwe.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/Gz5giL9/64444684448.pdfIn PDF document text
    • https://tafivemusuwivik.weebly.com/uploads/1/3/5/3/135322605/4634754.pdfIn PDF document text
    • http://pekuxareja.22web.org/negative_feedback_mechanism.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_603ca91c3422f.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/j4gjhcK/funny_car_crash_videos_2019.pdfIn PDF document text
    • https://wogizirimabote.weebly.com/uploads/1/3/5/3/135337148/6904469.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/if76OZu/al_quran_digital_malaysia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_6045ef00a79ec.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/automated_guided_vehicle_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/dG7gemO/medewutuvuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gubadix.epizy.com/phanteks_p400s_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/92633238068.pdfIn PDF document text
    • http://tonavisuma.onlinewebshop.net/will_argyle_diamonds_increase_in_value.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/86723136167.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/gajiruboxapuzusa.pdfIn PDF document text
    • http://pigutun.myartsonline.com/vufolagibofurox.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/twilight_breaking_dawn_part_1_full_movie_in_hindi_download_720p.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_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 5660 bytes
SHA-256: 0022fad7f44773d1f3786b63db8758e7bb6b10639a6d545976651d223801e04d
font_01_sfnt_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 11356 bytes
SHA-256: 85378d8ebe67b5ededf556c66b734bd40aba017ad344461156b991d6e4018535

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