Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab86ece3ef837f0…

MALICIOUS

PDF

70.1 KB Created: 2020-11-03 16:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 235a8dc03af7e451de93b778c6f31e75 SHA-1: 07fa0e08349ef6a721da88ecb1c1fd7702b63cc9 SHA-256: aab86ece3ef837f0f5599e3d74392571dcc089a46b11c2f66852e2eadba4a0a1
94 Risk Score

Malware Insights

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

The PDF contains embedded text suggesting it is a worksheet, but the primary heuristic indicates it is a malicious redirector. The ML classifier strongly supports maliciousness. The embedded URL leads to a known malicious domain, likely serving as a lure for phishing or malware delivery.

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://cctraff.ru/strik?keyword=the+constitution+convention+worksheet+answers In 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/60e8e6a0-6eb1-4d99-93a1-9e191c9f4fd4/73847564848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ae4a42-b372-4160-b991-28579419d5aa/mega_man_x_sigma_fight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0408ebaa-7395-43f1-957b-0901b0319c76/58678043810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd04ab87-f61c-4aba-860d-dfc4db0560f0/bugibexaxipapojojotetod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21c10f6-41b6-488d-986b-7d6bd84cb8f1/50624546181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a847e7-4d66-432a-b76d-9013890062e1/pebulijitatasulemugutipab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8afe03-16b0-469d-9f1c-b3d898117bfc/97666251699.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/96128689396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d1d550-6b20-4913-ae7a-7e4553706936/couples_clbres_fictifs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b09e06-07c9-436f-85c4-7242643bffb4/83057857301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a894a6d5-d03b-4be9-8571-ad0089968de8/jivalefawutugedujupoguzik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485230ba-416a-4f05-86a9-5d02bdd77cdc/gexuwinerevas.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/march_april_2019_calendar.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_off0000d511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD511 5020 bytes
SHA-256: 25833f7357784740bcda2a86c01b11e53e1d3bfca1a92bb9e70e00aeee721e83
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 10780 bytes
SHA-256: db0017dec330b3694280869728adf277c018393ac41ef628f6aa8c947b0c3e69

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