Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbdf17d3838f53e…

MALICIOUS

PDF

61.4 KB Created: 2020-11-13 17:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ac81bd0b64fbb7ce0d06a3740c40965e SHA-1: 3fd1df021ca3c0e358e721940d1e0ef1fdf25fda SHA-256: 0fbdf17d3838f53ebf770e10e7258a4bbf0b6943171cbbdb1aa10fa716859f65
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffe.ru/123?utm_term=chim+se+di+nang+moi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fa11b1601ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424405/normal_5fa6dcc585011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5fa10bc87dbe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f8fee725bc70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f98ada9ef101.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/ninikosobotalos_vaner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5fa87089d72a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f87a82e27aa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/676de803-51b5-4580-8833-7f67b0efc674/runefetikezofagusimofusap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e480b437-038e-4577-adc8-5e7dadb769fb/first_aid_for_the_psychiatry_clerkship_fifth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/vocab_unit_12_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/el_paso_white_pages_directory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc58a112-7881-475e-ae2d-b097840f47a6/jevitinukisesiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/ladiguloworupugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8db6a86-574b-4dde-8b76-241029fb2ce0/mixofavonofobaxakepirado.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_off0000b37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37C 5016 bytes
SHA-256: 3153c3b5de42beff974285499178dcca39390310a1c83d56afb7be138aea8dd2
font_01_sfnt_off0000c462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC462 10816 bytes
SHA-256: 413f609ce7060b0fd1de4a027160fb77b092458277ef03cf36c846c0b5ebacb2