Malicious PDF — malware analysis report

Static analysis result for SHA-256 15356d3103284179…

MALICIOUS

PDF

67.4 KB Created: 2021-02-17 18:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bf426eb8302d827996acb6c3b941d8da SHA-1: c6fc20c8691a109d8025d0bcc4312d20f95986bf SHA-256: 15356d3103284179f0fa018a9c04c5c10854827173bc6e84afb1fa9c79dfec00
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=states+of+matter+worksheet+8th+grade+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5ff85dbccbad2.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/zevisisigozo.pdfIn PDF document text
    • https://bumarotijij.weebly.com/uploads/1/3/4/6/134688095/xevonisifidav-jomolerivos.pdfIn PDF document text
    • https://javubabajekav.weebly.com/uploads/1/3/5/9/135957287/523575.pdfIn PDF document text
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/3596595.pdfIn PDF document text
    • https://voxisazemiruza.weebly.com/uploads/1/3/1/8/131871554/790fa82b.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/nuborefaxudaka.pdfIn PDF document text
    • https://fupiledur.weebly.com/uploads/1/3/4/5/134527701/nabubodupuvugex_mapobozuxagi_sugetevix.pdfIn PDF document text
    • https://zivadufo.weebly.com/uploads/1/3/0/8/130874541/kovadasojuvo.pdfIn PDF document text
    • https://kodalisurodufe.weebly.com/uploads/1/3/2/6/132680932/bowekam-bajoladesekifuf.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/38f322ba8.pdfIn PDF document text
    • https://vifojozajo.weebly.com/uploads/1/3/1/4/131454549/zufojevaxejumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/setigafat/59649445998.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/hp_raid_utility_software.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/cadillacs_and_dinosaurs_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/class_10_science_chapter_11_question_answer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC36 5484 bytes
SHA-256: c2037b0bc40104ef6f4d8f168e32c6dfd42f0a16831b0b467bb4dedaccbecfac
font_01_sfnt_off0000ceb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB4 9844 bytes
SHA-256: 4484ba9887aa048957e63608a5454625bc625ad3c4e993fc02e42f3cb1645651
font_02_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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