Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93ea55bf88f3241…

MALICIOUS

PDF

74.7 KB Created: 2021-05-02 15:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 21faddc4a0aa2b8a47f944d7a59ae4a8 SHA-1: 80d59daf625cc3ea421bea4153441fd6c4a2273d SHA-256: e93ea55bf88f3241d2485b5a97105b8783ccbbb6daa59b619b12a68a21df0314
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains an AcroForm button with an action trigger pointing to a suspicious URL, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of an embedded URI and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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=paulo+coelho+libros+pdf+veronika+decide+morir PDF link annotation
    • http://fukozokugolot.iblogger.org/tecumseh_carburetor_primer_not_working.pdfIn PDF document text
    • http://winoorama.fun/when_was_greek_theatre_most_popular6nsjb.pdfIn PDF document text
    • http://omerkatanalp.com/giniwonesoviniziwibxgjft.pdfIn PDF document text
    • http://antonioit.space/how_do_i_apply_for_a_us_postal_jobvfszr.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/d8c7d1.pdfIn PDF document text
    • http://usacreditmonitoring.info/epson_printer_xp_200_inkp9brf.pdfIn PDF document text
    • http://help-copyrighteamservice.com/login_touch_n_go_ewallet2ss9x.pdfIn PDF document text
    • http://reduslim-italy.site/archimate_certification_study_guidesnpee.pdfIn PDF document text
    • http://academic-club.ru/percy_jackson_film_completo_ita_streamings5ey4.pdfIn PDF document text
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/zikimu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_6003b46594cb3.pdfIn PDF document text
    • http://kagogumo.iblogger.org/16703948272.pdfIn PDF document text
    • https://xizexinapak.weebly.com/uploads/1/3/4/3/134359948/9d430de033a606.pdfIn PDF document text
    • http://xatamekele.iblogger.org/calculation_meme_format.pdfIn PDF document text
    • http://newyearshop.site/birekizatink8rl.pdfIn PDF document text
    • https://sevebara.weebly.com/uploads/1/3/4/5/134501605/paval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_5fd9998b82cfc.pdfIn PDF document text
    • https://saworajopasu.weebly.com/uploads/1/3/0/7/130775294/fejirifero.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/wotodedaruzuk/math-_aids._com_scanner_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/hailea_chiller_hc-_500a_manual.pdfIn PDF document text
    • http://kojomazudogog.epizy.com/21970087072.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/unbreakable_full_movie_in_tamil.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_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 5660 bytes
SHA-256: 8203e7cefec247c515b80d242e7b0ebef7ffcc47a2b0febde42f80f6b74c634b
font_01_sfnt_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 11536 bytes
SHA-256: a71fd780484a95a9feae294dbc9e6ee119afeaf71aed9c6d58b224b6de6e9b56

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