Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f4897cab23f5e2…

MALICIOUS

PDF

39.8 KB Created: 2020-11-09 11:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 76e731e09aa1d756c993cb2c73a7e0a5 SHA-1: a09f1cb80a0d43e81773b1bb3088fe662d796ab2 SHA-256: 41f4897cab23f5e25f2a1b344edce91fb6eb8527e39292f09370f66e7b9e2178
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://traffmen.ru/123?keyword=external+appearance+crossword+clue In PDF document text
    • https://gokisixoxi.weebly.com/uploads/1/3/4/1/134108612/8271441.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/pinujozuweture_domonuxagom_gufuwofegon_fowal.pdfIn PDF document text
    • https://xuzojawuwakobo.weebly.com/uploads/1/3/4/3/134312069/43a19c531e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fa896d0a9787.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.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/kavitokolezub/shobde_shobde_al_quran_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706dd3e3-17fd-4f62-bf10-c1377605359a/tubodukivatenetugibox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fe8f70-e2bb-4988-8b3d-0115f167278a/95295252873.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/titanium_tv_apk_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c6e924-94ab-41a9-b0a5-b598ec53d2e3/kirij.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_off00005d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 5184 bytes
SHA-256: cd7b11e3de1e83f79d4d959ca026b3227e783831ff60ff707d04f509ee0a013c
font_01_sfnt_off00006eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EED 10520 bytes
SHA-256: f801b709fd1e1e37c100bc2a63ab372d5e7cc8acac2cd5e92b733aafcc53a0d8

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