Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce96418263e2360…

MALICIOUS

PDF

33.1 KB Created: 2020-11-05 18:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 006e32ed1b27039adeff2f6df3e87363 SHA-1: 1c25b1faa596e4343e1c6c9809d63555fbbd64bc SHA-256: 9ce96418263e2360c2056ff8216984acf819030adaf01968b5b942651bea49a4
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=2020+class+c+rv+with+washer%252Fdryer+hookup PDF link annotation
    • https://tibulewozimok.weebly.com/uploads/1/3/4/0/134017320/tutejunewop-mipamizexabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446762/normal_5f9dfae886ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_5fa3dec411650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f9cd78ee2b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f8da294514bb.pdfIn PDF document text
    • https://gafixipen.weebly.com/uploads/1/3/4/4/134444756/f98c7866ef.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/6663e2f3-90cf-460e-b05c-948438c2e7e3/echinoderms_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0838b4fa-6496-49b2-b08e-0c4a2790669f/hp_arcsight_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71536c37-01bb-408e-9c7a-dadf08d2ae0f/the_art_of_megamind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b393d0d-3643-429f-be43-67c440cb62ac/neziwelutibotenikerul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159a9533-4604-4092-8a13-a3c3aedfa700/pabefatozapabebomigaroxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c618bf1e-0996-4b1b-a60d-accf042b725f/bdo_ps4_trading_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9281/1162/files/41448477726.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_off000043fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FC 5696 bytes
SHA-256: d9f32bdc513d89f0d9042d89dbc40edbcf9520c00dc77193a2cd4a911c81e04c
font_01_sfnt_off00005776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5776 9556 bytes
SHA-256: 51f03eb957bc56b3a004ed6fbda22feaeaefef164596a5f1caf460578e119025