Malicious PDF — malware analysis report

Static analysis result for SHA-256 5569588135204334…

MALICIOUS

PDF

36.1 KB Created: 2020-11-09 12:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: df0f1b1c029d4658c1b0f1f4303e5408 SHA-1: e57ef6cb5a992fdf6536b8e6824e428c168a8f71 SHA-256: 55695881352043342a67bd76525949328a71bd3cfa9c3a2518edc21338e7dd86
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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/aws?keyword=words+that+start+with+sleigh In PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/23462a6bf0d.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/lebiwovizirupatar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a521b1-6766-4a68-8bfe-9e7f6f8ff24a/62086654753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a514497d-d4af-4858-ab27-a3d588397824/rosekuroxusavat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877909dc-db51-4a6e-8386-4f71bf839b76/gowolusuzifijol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f3a956-54f3-4e43-abfb-94452c38820f/assassins_creed_origins_arena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d2c59f-15f6-4eb0-ba5d-e576faedbb7b/gepubuwajumimomexureze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d8f95e-39df-4ad2-8ef5-5d89dd9a6185/14119821341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f1864a-a314-4144-9c88-552ad3313644/67303300388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b543098b-5614-435e-bb8e-5ba4840333bb/minozulidijivenegulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706f690d-6316-41e8-adb7-7688facfc7fd/tasuzeripivikal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8919d59e-4f5a-48ed-9d77-549452dc2e1d/vojidixama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4162e70-da4f-4ca7-9e80-7dc16b025ef8/jujiseganedumavozuleru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db83166e-1116-48d0-b19a-419201e21083/club_penguin_unblocked_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6f61b3-ad4e-4672-8d5b-2bb2fcd79968/6533331472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3b66d4-5a9b-4015-bfd3-5dc4adbb4828/tugavi.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_off00004f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9A 5192 bytes
SHA-256: 85f8b0413b38768cf097c0ccaadf354b48ed7c87158b17a253af3c85d3da63c5
font_01_sfnt_off00006156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 10176 bytes
SHA-256: c07a297873c9f0c66d3d410903902cb4b78b5a74a2d643ab6a6b671f0d1bedf6

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