Malicious PDF — malware analysis report

Static analysis result for SHA-256 103fdf5b7d906620…

MALICIOUS

PDF

55.6 KB Created: 2020-11-01 22:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0164ab30dc8f23110e39f0a6a260bb3b SHA-1: 24c4a109121e6c85c7c6f5bae3af0c6b9b0fc1eb SHA-256: 103fdf5b7d906620571f6354d72bc9b850ad2c828c952ac0fe9621123adb8603
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=state+of+nebraska+new+hire+reporting+form In PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/4346137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f97845ebe41c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/word_biblical_commentary_genesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3930/7949/files/agnes_gru_sleeping.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/what_does_holden_say_about_jane.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/35343069248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3527/4658/files/fazuniluwamebeziguw.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/approximation_theory_and_approximation_practice_trefethen.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bangladesh_election_commission_job_circular_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eaaab31-5c18-4737-9c0e-a9d4221b22a0/foxesijozafipesipurag.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_off00009562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9562 5680 bytes
SHA-256: 37304fe9fce65464ab1757ecaa30ac95b274e9dff27f449ebd9a41ae8c4fc79e
font_01_sfnt_off0000a8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A0 12884 bytes
SHA-256: 34d93d2ea61501282bf2d24a8a2b83902f14af12da0ec877ff2d62bdcdaf3885