Malicious PDF — malware analysis report

Static analysis result for SHA-256 95116987f69beb8a…

MALICIOUS

PDF

43.9 KB Created: 2020-10-05 19:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a3c8ad90fc4e12e8356acea5b5dacf16 SHA-1: 2ae8cb77fa4766f2b80221423fba13fa7d969123 SHA-256: 95116987f69beb8afea967a2cf26b0289b20f7e28dd3a759ee888fa1786e26cd
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://ttraff.com/pify?keyword=orono+high+school+hockey In PDF document text
    • http://zikufivej.ladylikeschool.com/uploads/1/3/1/4/131406449/bf3f7654adb.pdfIn PDF document text
    • http://telow.amybourne.com/uploads/1/3/1/6/131606402/844aa56ff158330.pdfIn PDF document text
    • https://site-1039149.mozfiles.com/files/1039149/kakekifotirarudox.pdfIn PDF document text
    • https://site-1039661.mozfiles.com/files/1039661/kufeba.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/30532791624.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/1/0435/6718/6079/files/sex_influenced_traits_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2274/1415/files/97259626785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3393/2188/files/vatax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0565/9296/files/2017_ap_computer_science_free_response_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28fe6b5-cc49-4a37-b67f-26c5afcd2d16/64328781804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3734efc-0e7e-4830-9487-3c94b8afa81e/86351449606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234132a6-f4e2-4d00-85ef-23126021e78b/lasodarog.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_off000060ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 5044 bytes
SHA-256: 565a9118906bd8b37d483c206a93b0db2c7de0debc333c902885c219e8964931
font_01_sfnt_off000071f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 15484 bytes
SHA-256: 74b88cf964f8c6fc6c8a58a3d9f4df2282c9fab5f836a29141c42f245c73c42b