Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a65c695ccd77d35…

MALICIOUS

PDF

39.1 KB Created: 2020-11-06 10:09:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 603877bab7689dae7ade7ab89cf5dc25 SHA-1: 0dfb23b87f7dd879aa7f68daad41c6109b416d02 SHA-256: 9a65c695ccd77d35410afffd1eac6c689b46f4c56a669e8349111c582cf68854
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=auto+liker+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_5f9cc6452ad38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f90de6d09ed9.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/2527536.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/pisedij/ebay_answer_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32bf1ac-cf34-45e8-89ed-0a56f96c1506/atividade_com_verbo_to_be_5_ano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d6c351-9495-44b5-8ea7-56c8f6fd60b9/93088753263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fb70b8-fca2-434d-8581-9a184e27330c/8821244129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a622871-c065-4fe5-83a9-8bab752ca7b9/hp_fax_receive_testing_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e175b423-648d-4e5b-a053-60569111fb81/rotmg_guide_for_noobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c2868c-daee-4d51-8afe-a1c1bd145254/tuxufuluguralanir.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_off00005d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D20 4688 bytes
SHA-256: 6768a369d5484ef2fc8d665a8b79dcf762bf22cddd5a55fe8ad9e1cfcb2d1713
font_01_sfnt_off00006d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 10284 bytes
SHA-256: 3426736ad22e1161381a6bfd8164090a38c4f0ac62ead6f069d29e307ae5e4c1