Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41315c3eba9c2ec…

MALICIOUS

PDF

52.0 KB Created: 2020-11-03 13:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fc7d32a0d89501207df75c0ad557fb3b SHA-1: 27f4f0018dfa1396115aff466f4b1ceac1dc54f8 SHA-256: f41315c3eba9c2ec7c8a1805d50dbe2537fd6237b7693bdfdc0b5318448aac77
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.link/123?keyword=zombie+games+unblocked+at+school+333 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/tovoveti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fce2568-8515-439e-b988-02f5bf87ba98/rawukomubidipukiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f155ae-b0f2-439a-833f-948a603310eb/desabunomukubilasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebceda2d-5e93-417d-adb5-526990ef9695/vevanujukipukaxed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da6b9c9-c0f5-4d77-aa9c-b14763f5529d/step_up_medicine_in_nepal.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/oleanna_david_mamet.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/mokinekitawunowoziwesila.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/92554957225.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/49660164942.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/rimbaud_season_in_hell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99fb62b9-8cff-4c09-a347-4201074bde09/92813046531.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/negadezimomose.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/ruwunojumizem.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/32785540078.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/malawusigekovuporur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6017ff24-5403-4050-9ac9-3d23dd6fce5a/86921275124.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_off00008b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B94 5580 bytes
SHA-256: c4d5e063f63f1f621198d07dc8d3ebb7c82fbf6f752e5ac3e2484d48080c69a1
font_01_sfnt_off00009e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E72 10704 bytes
SHA-256: c682bb08cf75825643b0dc20961be2a9e863b0c3f68e18a700eea4ded76fbef8

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