Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cb60dd3c80821c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-25 11:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 09a11e6f7469d9815dcc1c99e5681a60 SHA-1: 598a4f0a2ad17605a84683d915354cbdc2c757f8 SHA-256: 37cb60dd3c80821c3025b0d8035771a52ec62ba52b741647a5834c23b44e990a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wb?keyword=beginner%20classical%20piano%20music%20pdf In PDF document text
    • https://cdn.sqhk.co/padasagam/ejjhrjh/navawonupijazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_60373a9897439.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/fnFnAey/11932462458.pdfIn PDF document text
    • http://xugememutan.iblogger.org/b_truyn_oxford_bookworm_library.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/obs_7.3_powerstroke_fuel_line_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fd6e63fa9c10.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/ebgHidP/scrap_machine_wow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5fcf0bb8cf8f7.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/RgdgcxQ/bifomesodidutimaxa.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/ditiruz/sakobemumitoze.pdfIn PDF document text
    • http://medexode.atwebpages.com/tovowizupewukidarojedub.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/22368180541.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/lord_of_the_rings_extended_4k_release_date.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/power_book_2_ghost_season_2_cast.pdfIn PDF document text
    • http://dorizoki.rf.gd/alice_cooper_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/menagerie_runes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/tratamiento_de_sinusitis_cronica_en_adultos.pdfIn PDF document text
    • http://nasujaguza.epizy.com/49668057929.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_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5524 bytes
SHA-256: c6343350696ac4f4fd43125c7a459bea9a6dcb719609549a57dbb7333bbba0d0
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 11400 bytes
SHA-256: a5045147c15d3b9438809852d3837c673395d08e66b462d2f913dd41c59ad6be

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