Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dbf02cddc5aea45…

MALICIOUS

PDF

41.5 KB Created: 2020-11-06 22:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 92be6c132feebf9a8229ab5bc785828b SHA-1: dc26097e08e950284e48236686d6337b6b0941ac SHA-256: 4dbf02cddc5aea4512913daa75dcc85f29b0f67db0ab087387aa221055b2d981
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=boundaries+participant+guide+pdf In PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/3016426.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/gorajikunobixi/farm_tax_expense_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/51393367140.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/goblin_slayer_reading_order.pdfIn PDF document text
    • https://mawawozezo.files.wordpress.com/2020/11/gixebikev.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/44955611074.pdfIn PDF document text
    • https://pufewureda.files.wordpress.com/2020/11/gikosozatajalomiginex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0551b8-ee76-43f2-ba0c-d02e5911c1d4/johnson_repair_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0d5244-fdef-4fb5-9ac1-34b71b5c55a4/88076406743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5354fd62-d10b-4147-9af3-b25292a9000a/81469482350.pdfIn PDF document text
    • https://s3.amazonaws.com/madegusulepugif/wowurivaxivaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4f485d5-76f5-43fa-a6c1-3e8a778c36e4/dekixujunabunig.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_off00006293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 5340 bytes
SHA-256: 0c5c6ae58e653f7a1600d951388a8433c0634732b38d76e2eaa7aa0aab5a33b5
font_01_sfnt_off000074d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D4 10752 bytes
SHA-256: c52debc1e339cff302461bdc9bc170bbc8ee7cd7d9f468e6154875ae3e25dac8