Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c473c6bdf19431c…

MALICIOUS

PDF

36.2 KB Created: 2020-11-08 19:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 16fc90ea60f1b450ed8fd2ee08b78366 SHA-1: 169514aad8f8013a902ccf8c7dbd9661f871f206 SHA-256: 8c473c6bdf19431cf3eb615e1c20786b431e4596968748b4519cffbf408b37cd
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://cctraff.ru/aws?keyword=army+religious+accommodation+policy In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/3dbffb.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/jozolovamonowakax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5f93bb57cfec2.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/nixezuwime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_5fa1c04fd963c.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/0977d74c-cd4d-4e7b-b5bf-d2b598ad5a63/posie_en_sortant_de_l_cole.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/jurumepuzegabebozepozu.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/bowflex_motivator_2_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/redokaguwuferaz.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_off00005200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5200 5484 bytes
SHA-256: 99dd41e7b3b9ba70ef041fce99e47f796c68629e6e7364f937faca4de483cfec
font_01_sfnt_off0000649f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 9268 bytes
SHA-256: 9e5c56290844f6cf4233a103fa2de7cb9899bb0d3ba09bfd33e9fa35b32fc9c5