Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2c4cb1abfcac76…

MALICIOUS

PDF

42.8 KB Created: 2020-10-16 17:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f3a40d653a0ea377292e2c5738a1833b SHA-1: 7f286032f8836a2bb74caabfe628d739baccf5b0 SHA-256: cb2c4cb1abfcac7623adf08b84190506a029ca1d352fe24c5114c201d0c25e65
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/123?keyword=cod+strike+team+android+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5f878e53eb082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f899d18a013d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f87b08b56e38.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/5413437.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/ronufebe-fazabewoxifuli-mitosi-sobonatifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f87b13483f8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8711f160132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8735868cfbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f87bf1753fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f878c78c027b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f89a2bb58c30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f889a3f9a2f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8807415c5b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f872600527a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f87a3754280d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f873c4cef43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f8928a79dbae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f87a43e39f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8710d5af0e6.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/1/0430/3441/1157/files/freshwater_biome_animals_and_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/powerdirector_pro_full_apk_gratis.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_off00006969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 5032 bytes
SHA-256: 3f1b5341b30ecf52080cde340439e062d4e455a01b320156d49fef928a01870d
font_01_sfnt_off00007a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A82 10292 bytes
SHA-256: 9aa669cb21539a28daccae4838adad30c3d1625109ad846f5b3877295129e763