Malicious PDF — malware analysis report

Static analysis result for SHA-256 757eed058f0d9e68…

MALICIOUS

PDF

78.8 KB Created: 2021-04-08 07:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 35227834446d1d4af22b638dc5f09c3c SHA-1: 992561f5c708ed714ee6d5e5d30a0961091f8170 SHA-256: 757eed058f0d9e681ee06320f46449aeb2f9e05c280858905d58d648c13e7610
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://pelibifir.ru/123?utm_term=sailor+moon+manga+pdf', being flagged as suspicious and potentially part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to "Sailor moon manga pdf", likely to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pelibifir.ru/123?utm_term=sailor+moon+manga+pdf PDF link annotation
    • http://sudesisobibimit.22web.org/vetodifiroge.pdfIn PDF document text
    • http://bt-management.website/c_compiler_idekzg7r.pdfIn PDF document text
    • http://fijixedi.22web.org/warhammer_40k_chaos_codex_8th_edition.pdfIn PDF document text
    • http://xisubov.iblogger.org/jinolefora.pdfIn PDF document text
    • http://dreabling.online/nuximetixeveeuzd.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/detofuwutisadujipojorobez.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/dabawenilunevavukaxipo.pdfIn PDF document text
    • http://telewapor.22web.org/11727983659.pdfIn PDF document text
    • http://form-copyrightservices.com/sediferaloxutajovojono7w1of.pdfIn PDF document text
    • http://kisiguvawatabom.22web.org/sabag.pdfIn PDF document text
    • http://dejafonuzu.iblogger.org/the_rebel_by_albert_camus.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/business_english_reading_comprehension_worksheets.pdfIn PDF document text
    • http://sberbank.services/analog_photography_andrew_bellamyntkfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://warozuvade.epizy.com/job_appointment_letter_download.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/2005_honda_odyssey_shifting_problems.pdfIn PDF document text
    • http://wuwedutukuw.epizy.com/default_workbook_template_excel_2010.pdfIn PDF document text
    • http://bufagefitazi.rf.gd/cdf_and_stats.pdfIn PDF document text
    • http://pivutabomenatam.rf.gd/guxiwukewimifidavinidif.pdfIn PDF document text
    • http://wosunitiguzivef.epizy.com/rejalewiludurofa.pdfIn PDF document text
    • http://savekuf.rf.gd/nursing_mnemonics_free.pdfIn PDF document text
    • http://tovajukoxeboder.epizy.com/book_cover_page_design_vector_free.pdfIn PDF document text
    • http://wemuvolelotufe.epizy.com/41273843480.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/bengali_news_paper.pdfIn PDF document text
    • http://lodagid.epizy.com/71185279484.pdfIn PDF document text
    • http://ferowejolalaro.rf.gd/concordancia_strong_espaol.pdfIn PDF document text
    • http://wivukirotodit.epizy.com/fulenada.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_off0000f5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 5288 bytes
SHA-256: dea31dede8fb873cdcaca5288a0a98bd96a51704302457feb0ee5907242c59f5
font_01_sfnt_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 11236 bytes
SHA-256: ef827c78a8af1bec53525fb7b9bc540e116b4aa16205f3c802e808a01ab6ded2

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