Malicious PDF — malware analysis report

Static analysis result for SHA-256 97df0196e58f90c0…

MALICIOUS

PDF

40.7 KB Created: 2020-10-12 10:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7b3b41e2d63cb3240d14803d18b94bc2 SHA-1: 6654e4e1474693bc1e71021394f6c1d953f82d93 SHA-256: 97df0196e58f90c0fb46ee030282a82fc2b001270ab2f5df2f0e8ad64ae8a53a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.me/pify?keyword=arris+tg862+bridge+mode+comcast+router In PDF document text
    • http://files.persiantechnicalanalyst.com/uploads/1/3/1/4/131437812/2159636.pdfIn PDF document text
    • http://files.coloradojuniorcup.com/uploads/1/3/1/4/131453269/2506271.pdfIn PDF document text
    • http://lokid.speedwayandroadracehistory.com/uploads/1/3/0/7/130775683/kojopunovokifuwozemi.pdfIn PDF document text
    • http://files.tdcfamilylaw.com/uploads/1/3/0/7/130739002/67723ea6d4b.pdfIn PDF document text
    • http://pomova.kitchenettecuisine.com/uploads/1/3/1/8/131856005/627316.pdfIn PDF document text
    • http://files.stoddardumc.com/uploads/1/3/1/3/131379396/jajosubemom.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/72a66c3e-ac01-4bec-aec6-8f9910104203/vizejuvaluvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ab4898-2dbd-4501-9add-674d098a5300/watukepimozezijugukiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb258748-12dd-44d5-8772-9591baa0fb87/95587017560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f269d29-c199-4784-af0d-18c63f75e91f/89485434936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc90191-4a62-4232-b83c-db14522a9f37/danamemuluwejogerumes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6317e75a-db03-40e4-a525-01b51da109fa/kutomud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00b9254-4bce-4ba7-9111-bbb6b839dbb0/zaxuwu.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_off00005ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECE 5836 bytes
SHA-256: c6cf0fae337514d7c5c3cba027c8ee7551763bb22c24e87eefd446677e2a5e70
font_01_sfnt_off0000727d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 10632 bytes
SHA-256: 4cc8916675893d44fd29a1e1f71123d1e93967832b4fce0e58aa7b26c94750af

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