Malicious PDF — malware analysis report

Static analysis result for SHA-256 f335179699287ab2…

MALICIOUS

PDF

40.0 KB Created: 2020-11-02 12:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6c5e587c59e17483e050b29d94310978 SHA-1: db52f4cc480d698376fed2c80be391cb7c29e27f SHA-256: f335179699287ab29b45de437972c799a908654e6d16cd410a3dfb19c95a267c
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/strik?keyword=fairy+kingdom+cheat In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f8a574993d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f9e11cce116b.pdfIn PDF document text
    • https://pativezakuzorad.weebly.com/uploads/1/3/4/2/134266084/bulariw_xegevimag_fozufuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_5f9ec17c2c3df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9100/1021/files/bufosotogulikiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1910/5979/files/futase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/gregorio_del_pilar_flag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1872/3229/files/fire_red_omega_physical_special_split.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0385/8077/files/21305351517.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/comcast_error_srm-9020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7825/3251/files/technique_cookware_warranty.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_off00005ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 5264 bytes
SHA-256: 9cdc08c3605d36c306d76c3186df8a2cae1c3739eb362664cedc1832cf496fdb
font_01_sfnt_off00006c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 11696 bytes
SHA-256: e3ddf72419bd073bca231eb977b4f50d6bd3c29d7b3d4fe3d53257829bade761