Malicious PDF — malware analysis report

Static analysis result for SHA-256 f821ba90a2f241c6…

MALICIOUS

PDF

74.4 KB Created: 2021-03-07 08:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f4b0cc12a29f326d31a3707c9c5ee115 SHA-1: ace9cda91096a5ba8fa0309f95a9e74b21466531 SHA-256: f821ba90a2f241c6b9bd64cb23e4489955e771a14bf714e5f5bff31a5e726225
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/award?keyword=the+masque+of+the+red+death+discussion+questions+answers PDF link annotation
    • https://cdn.sqhk.co/foxoxaze/icY3Pij/81829560708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_5fe9dc1e5bb9e.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/86756853101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fd318c84f1ed.pdfIn PDF document text
    • http://4gusevshop.website/48767715204vp7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_6026833e6bca5.pdfIn PDF document text
    • http://tohld.in/rawibebc6l08.pdfIn PDF document text
    • http://itrom.fun/how_to_train_the_best_dog_everges1g.pdfIn PDF document text
    • https://cdn.sqhk.co/mewoveri/Lhigcgj/necromancer_story_mod_apk_free_shopping.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvarijes.atwebpages.com/32078148185.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/91582339223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa79ebc-b6e1-49b4-aad1-35e17871eb8c/asrock_970_extreme3_cpu_support_list.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/57957827607.pdfIn PDF document text
    • http://javewexo.epizy.com/gibudafem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb1fdb3-329a-4fcf-897b-fc3c78db88cd/gupojajikulozejakolidike.pdfIn PDF document text
    • http://zelixedamaxux.rf.gd/derides_crossword_answer.pdfIn PDF document text
    • http://fejivexol.epizy.com/gitunemetatifejezigu.pdfIn PDF document text
    • http://vusoxererereli.epizy.com/ielts_listening_answer_sheet_sample.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_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5396 bytes
SHA-256: 08eb0779d93608d03571e38625a9ee035a58d2a946994463c99eba7b1cf3a18e
font_01_sfnt_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 10208 bytes
SHA-256: 9cfcb2a5f397070e0e012801e10542fd7323a226b8583c4ec8c3f920c3b9dd85