Malicious PDF — malware analysis report

Static analysis result for SHA-256 001724cddeea24c4…

MALICIOUS

PDF

78.9 KB Created: 2021-03-14 09:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: adc54923e74c281fdf9d8918ab0fb218 SHA-1: b8829c275e37b9f449c05bbb191b9200cc3f1807 SHA-256: 001724cddeea24c4ee170db0b22b169843135b8f30ec5034c13c7735b42e3d4c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=bread+recipes+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/perokokamosa/dLhehir/96391824633.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/f6sMXiy/frontline_ship_attack.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/40281056978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_6042c8eb00372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_5ff42847e27fe.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/how_to_get_entry_level_graphic_design_job.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/0ifKzhg/white_cat_wallpaper_hd_free.pdfIn PDF document text
    • http://wuromigujab.iblogger.org/part_of_speech_preposition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382779/normal_5fd08b2930654.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvifilezaja/gcKighe/pamegesurejoselebikino.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_6008663248952.pdfIn PDF document text
    • https://cdn.sqhk.co/gupikekarobo/c6via6Y/cheats_for_gta_5_online_pc.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/fejidumupokugebi.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/ebjgghe/dream_cruises_television_show_episodes.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/english_language_teaching_resources.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/vunizi/mobile_app_template_for_ecommerce.pdfIn PDF document text
    • http://bonipoja.epizy.com/reimage_anti_spyware.pdfIn PDF document text
    • http://jemileti.atwebpages.com/pressure_transmitter_calibration_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/boomerang_song_imagine_dragons.pdfIn PDF document text
    • http://tosotagerazopor.epizy.com/american_airlines_application_form.pdfIn PDF document text
    • http://xajuvezovaguze.rf.gd/hp_50g_vs_prime.pdfIn PDF document text
    • http://wumawiriwize.epizy.com/matazasuva.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_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 5288 bytes
SHA-256: 23f25476870b1d270d5eb7233bb5fe4cc873cdaa4c842f3136fa2f14556e21c1
font_01_sfnt_off00010931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10931 10900 bytes
SHA-256: ca1a261d8cd4cdeaaad896808afd2b7a4d7e6ef8f05f157bdf198cdbf18f536b

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