Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc74284037df881…

MALICIOUS

PDF

50.9 KB Created: 2020-11-05 03:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6b348f67f868d485ffe7f03e8e96f22c SHA-1: d287e9ba750a06a991cff1dae34b0cd0cc2ae625 SHA-256: 0cc74284037df881d5c0b11c1d26bd21cfcdf4a69bc5fea03f977508bdda123b
94 Risk Score

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://cctraff.ru/123?keyword=genetics+practice+problem+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f93a7fa231b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_5f9c02423a2f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5f8c0e176d3ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5fa0cd2183790.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/d30e9888-e968-424a-9f43-353bf5b9de49/dilewuvaliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d9cdbb-5b55-4c13-ad91-456b6e050f41/vamasunanamagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ef6019-ee48-45f6-a323-534a4389dcd0/dimetanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa7a6f2-e06a-45aa-807c-461d4508a776/dok_250_mg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2a6a63-2273-4032-b400-31cf92b6e547/81436686187.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/sovurene.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/brother_p-_touch_label_maker_manual.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008e21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8E21 27380 bytes
SHA-256: f9f6c1c1ef68b9295951ba16b3d2915e7ef8a06ad52ebe164079581a193c0645
font_00_sfnt_off00005968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5968 5500 bytes
SHA-256: 74bb9059609b8431d32b86dbeec977a3c540fea4e389f1579d063536339b7c19
font_01_sfnt_off00006c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 9892 bytes
SHA-256: 5b17d963d85edee9a2613977f391b1a2cfd9fe9f24ef492db594d81eb316a9f9