Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c91a314253521d6…

MALICIOUS

PDF

70.5 KB Created: 2021-03-05 14:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 71a7600f4488643f75cc23886afadbdd SHA-1: e905a70017377f6cab03fba93061061165309547 SHA-256: 7c91a314253521d67ffd2aac0d2faa7c1c6cdbfedd6efbc55b27497e4e82e30f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://kuzutuzo.ru/award?keyword=sda+church+live+streaming+usa PDF link annotation
    • https://cdn.sqhk.co/navimoxa/gghbhaO/wulunalerebigaz.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/murray_lawn_mower_dealers_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_60233d40e3578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5ff43164a9c92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5fc90e4b5f455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_603b53b1c3aff.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/foxadurarorenuwimaf.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/lange_psychiatry_10th.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527859/normal_5ff0376be0bd2.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/GjcLwx0/fikamokamenijow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376850/normal_5ff5b641c614b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_5fd3a2896b22e.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/borurifovajep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_5fdf6e3d2f0d0.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/jujimisevemolumageg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_60057db67db5d.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/kugerataxos.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/waravusuvobuboxezoxeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fe77824bbd74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosigegu.onlinewebshop.net/reasons_to_stay_alive_matt_haig_quotes.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/how_to_stretch_for_plantar_fasciitis.pdfIn PDF document text
    • http://favolaven.epizy.com/jarowavevosi.pdfIn PDF document text
    • http://wulitebajanuba.rf.gd/faziloxamagamefaji.pdfIn PDF document text
    • http://bologipegokofi.epizy.com/advanced_language_practice_michael_vince_vk.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_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 5516 bytes
SHA-256: 2304d5e42bce9104e6f6a9f20a6f2c1b5af9f0ee33fefb35e7fa96667a544ac5
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 10120 bytes
SHA-256: bf525e2d49fc99ead18df2ef505c7fc77b84fdd85a7034c26a73015336e6f207

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