Malicious PDF — malware analysis report

Static analysis result for SHA-256 314b632260458f74…

MALICIOUS

PDF

46.0 KB Created: 2020-09-10 01:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a96aabac796695f8a9b4dcc8197799fb SHA-1: 0d591311222f687bb0379e82318af1be51ed84d9 SHA-256: 314b632260458f7468d2d70102b49c5a05c6582d5ba8210b3a6ece5a86d07ad0
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.cc/wix?keyword=bodybuilding+chest+workout+videos+free In PDF document text
    • http://pafavifen.stjosephtheworkersutton.co.uk/uploads/1/3/0/8/130874493/vodexurige_sivax_fulefiriwulovo_tavufuvomef.pdfIn PDF document text
    • http://files.musclegear-asia.com/uploads/1/3/0/8/130874478/kekitovem.pdfIn PDF document text
    • http://gamusugel.besthuntingbuddies.com/uploads/1/3/0/7/130775200/3036097.pdfIn PDF document text
    • http://files.adventurekidschildcare.com/uploads/1/3/1/4/131453193/lowipijefuwo_zuvinirakazite_pibikekixami_xitokin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e3f6b4ee8161407194d91592018acd25.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5472a_04bd1c15fb834d4baa0ce4cf53dcf732.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fc7fd14f55584cf981a041432a1bc95e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/34ec99_2d445eafdfeb4eeaaba86ff59950a7f9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e80f4c_d01b750b68104a4e87623027f93eab11.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ef7b09_d4a7160768174962aec24da65fd74ddd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c2b96ae9efea49cda02753a74a29d5b9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5e81b9_3fdaff8e348b4d7e922d2b0e75d721d4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/957c7b_504533cb35b04eb1949b461cc4010fb9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c0b427_41306c64ea0a4f0c8cfef6506a9eaaf9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9cb927_50db510245ea4676a5ab960489ce5ec8.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_off0000752e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752E 5580 bytes
SHA-256: 6542827a5a2a9a3189cfc5e5771a5270a64e5adfe6abf7656ff2174007bb5c83
font_01_sfnt_off00008850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8850 10160 bytes
SHA-256: f106c1c0b504fc8d4611684464ef8517c394282948bf52d901a5e20e43f62790

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