Malicious PDF — malware analysis report

Static analysis result for SHA-256 103b055d071e90d6…

MALICIOUS

PDF

68.6 KB Created: 2021-02-07 07:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 07978576ae40168861216469588b585a SHA-1: ac19094841d84a5beaadfb3ab08a733852cb4e65 SHA-256: 103b055d071e90d6c0c3c7960848c646de77bbb10ab2cfd5ba796c593ca8addb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=topics%20for%20formal%20letter%20writing%20class%204 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376101/normal_5fef9d540dbf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5fe79fb17591d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416787/normal_60007a7886758.pdfIn PDF document text
    • http://surevixa.22web.org/consumers_energy_report_power_outage_phone_number.pdfIn PDF document text
    • http://price-list.moscow/mousebot_app_storeefvqb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_60029aa51c0de.pdfIn PDF document text
    • http://legendnat.space/965816682452e15x.pdfIn PDF document text
    • http://stikc.xyz/xuwuruwopenajotjteq6.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/jumedemimo/17632239478.pdfIn PDF document text
    • http://gibonoxemibete.rf.gd/gender_pay_gap_reporting_uk_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/bubble_mania_game.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bawuterilosedimo.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/dusumibipusodali.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/comfortably_numb_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/40570611893.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_off0000cf6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6C 5464 bytes
SHA-256: 7f62a7f940aaabf5ef45febb421e7778228f41a51a93e9b4a3bf01980d6d5db2
font_01_sfnt_off0000e209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE209 10508 bytes
SHA-256: 6c6b4d740510cd0222272026167632fbba2ceac4e3b076bff64733dadde86fc7