Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd541f8b9878fca…

MALICIOUS

PDF

75.9 KB Created: 2021-02-26 09:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 950fbb0807ff33cb60db726132a69780 SHA-1: c9d04759e402d3fa43bbffb438e171a81f9d16f2 SHA-256: 4cd541f8b9878fca75ddac3ff9fe4ed72dbe6556077c0a4990ff2a281e3e0c89
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/award?keyword=what+happens+if+you+lose+your+gold+password+on+ipad PDF link annotation
    • https://cdn.sqhk.co/manizamo/hfiaoSN/baby_princess_phone_princess_baby_phone_games.pdfIn PDF document text
    • http://trendmobile.ru/tasiwexigyohj.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/craftsman_s180_chainsaw_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fdbaa207c59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5fd1a890c7005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5feba2cb301ef.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/how_to_prepare_a_risk_assessment_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukilaba.myartsonline.com/do_all_oral_b_brush_heads_fit.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/abirami_anthathi_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/aaina_1993_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/mafikigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/zoposovoravalifubebusomug.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/marantec_m4500e_remote_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/ribawiwatodonizofu.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/cma_cgm_vgm_form.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_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 5508 bytes
SHA-256: ca541d911941ef908b5885070779104ec7191391c57b6403dbe9dd0c466c4669
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 9856 bytes
SHA-256: 2b8d3111678d775c8f7087c232dad184ca3845e840a6fe4fa0049cf6e0a14527

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