Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f028994403fa03…

MALICIOUS

PDF

51.2 KB Created: 2020-10-16 22:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b62df02cbf418395642d6363a9c0d462 SHA-1: 6c369780d15b84a09fa67b1d9c9ab8b60b885b81 SHA-256: a0f028994403fa03e5cefca8a43433dc3fc953948a8de2f4ad1b7da3f5131cf3
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/123?keyword=need+for+speed+undercover+apk+file In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8733a0916be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f8922361b7eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f87750919c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f885f0046d34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f884ee3b6df5.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/badel_tusomino_mebemowoseni.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/570780ff-bd5b-4765-b008-295e4cffaa34/65802226238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14863052-b8c8-4e78-8323-a295db2bce15/sabavojeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ab837a-8ec5-4e3c-991a-d91c08b97f08/novez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10adf4c-9bf6-412c-b63e-c689af848105/63215144831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3203/9583/files/the_louisiana_purchase_map_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7669/7246/files/lupron_depot_package_insert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5587/6762/files/85175771438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3991/8742/files/lasim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/49018459382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/kebufifozutupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6e03dd-51cc-4571-b9e5-7c2c3f3ea727/munarepilagifezevixala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b56514-b5e0-4ffc-b76d-3a6ea3d53560/giwib.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6953 5244 bytes
SHA-256: e321ac6d9b39b286abdb4b52e648c2acf3fa66a8c523cd9ae4fdd6ac3f4a0ca6
font_01_sfnt_off00007b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 14656 bytes
SHA-256: ee431e53f9a269f0ba67ef70db18757bee045b3d608b9fdb43daeac678f7adad
font_02_sfnt_off0000a9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A8 16208 bytes
SHA-256: 8a920642403e862b8d76a30d6502ed32e081761114de4860b32093463e1ee433