Malicious PDF — malware analysis report

Static analysis result for SHA-256 983f26dbf547909b…

MALICIOUS

PDF

71.7 KB Created: 2021-05-09 20:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8790282faa619ae2ae6a3a1b4da3f0f2 SHA-1: 762f016ca53f3b1bd89b16a364412ea8daea36bf SHA-256: 983f26dbf547909bdc5f74857707029116284c6b836c3c40f3e61a2e66aa5238
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xajibur.ru/strik?utm_term=minn+kota+mk212pc+%25282+bank%2529+on-board+battery+charger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501214/normal_60148624930fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500670/normal_5fd0a0d257e6a.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/prentice_hall_chemistry_2020_online_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_600dbed3a8c64.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/west_bengal_election_result_2020_download.pdfIn PDF document text
    • http://jekebes.iblogger.org/instagram_highlight_template_psd.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/vozuzawipomizixawajeso.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/turuwotes.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/nosolugutitu.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/statistical_methods_in_research_and_production.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366335/normal_5fde216c3153b.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/what_are_the_48_laws_of_power_summary.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/30184906644.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/knee_exercises_nhs.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/wizakokowe/western_union_money_transfer_form.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/sunbeam_heated_blanket_microplush_10_heat_settings_queen.pdfIn PDF document text
    • http://newigumumakewi.epizy.com/59046576223.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/cazadores_de_sombras_serie_actores.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/wowanafafu.pdfIn PDF document text
    • http://zilisidojaze.myartsonline.com/scanned_to_word_converter_freeware_download.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/akc_temperament_test_evaluator.pdfIn PDF document text
    • http://bitinorakinin.epizy.com/9142610845.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/25473650107.pdfIn PDF document text
    • http://pasofotamuteper.atwebpages.com/negafexejiwip.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_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 5960 bytes
SHA-256: e85963243da36ed04041c792a97eadec1390177a38e494eb347cdaf5d7bf4487
font_01_sfnt_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 10836 bytes
SHA-256: 4c1a7d2e21282cd9eebbf0e4197348c5ea50efb3b393dffc1882aacc56b17db1