Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ac8dd732c78150…

MALICIOUS

PDF

41.7 KB Created: 2020-11-07 22:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8fc6799d2ec888fe2c108779c1fde8c1 SHA-1: 91c810cd3fe412a2a3fbbd34115f7ae99e4f66de SHA-256: 99ac8dd732c7815083116225889a9ac37d5efc75f387510058f9c785c1954068
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://ggtraff.ru/aws?keyword=movie+download+apk+for+pc In PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/muxilamaduvoga.pdfIn PDF document text
    • https://tigafuxofezez.weebly.com/uploads/1/3/4/3/134363272/fagajowawelaba.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/najanotosola_jedilukimo_muluviveburi.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/498c87dc-d229-4cfe-b56c-13e695842f1a/28901053537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe44596-f61b-4e90-95a5-5af014672094/36360408257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe34c4b5-6484-4de2-9d24-733143ffeacb/wojarogotok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b388581-2225-43fc-aca8-27bc8bb9af5b/nivugisovilixurosifumij.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/57320304913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133e14b3-80db-4f16-88fe-40830f209cd7/throne_kingdom_at_war_assailants_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27693197-4a38-469f-8afc-cc10130a7cde/pulofazevok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e046b1c9-eb75-42ec-9758-e48572785a05/xezoxumexa.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/lady_bird_deed_michigan_free_form.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_off00006382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 5192 bytes
SHA-256: aba171d3afcb58d88af367ea0a641c008a36de4bee567561a9944b888769fb3e
font_01_sfnt_off00007565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7565 10856 bytes
SHA-256: 2e0b1d658f487355c8beed1ff89fb7621d093e0ea6c4d413e98149e8da2698df