Malicious PDF — malware analysis report

Static analysis result for SHA-256 f736d887a8171ba1…

MALICIOUS

PDF

50.5 KB Created: 2020-10-16 05:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 66c35c30bfe47aaa64b3990d57dc90c9 SHA-1: ebd4f53353484da89e86dee7a7d846a21415782a SHA-256: f736d887a8171ba15e0368d283a022034a2b42de352694bb7411d4698b5b86b7
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.club/pify?keyword=trattoria+mercatto+menu+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/5995606.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/2090670.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9983eb59d859.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/0b287fec-ec45-4a37-9e70-6d1527407bac/zukupowavudimup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f35843-cf40-416e-8383-4c4123a83105/nikesiboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba19ca83-6ff7-45aa-a409-4bb0c4fd99d7/likumezurufiwopore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e45e3d5-0dc1-41eb-a367-275c90fc50bb/dulemabijodarawodigimira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e6e624-9d67-49e5-843a-fc12c869000c/wogupiwatajotuzepet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69633879-63a9-4e8a-a63f-f8b0c55473c1/nurosijakemevagime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7317670-2800-470b-bb0c-f20552a6fdbc/wimojimumorupalet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5b8bf1-d6f8-4067-b54c-bbe00a53cba2/buxopuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed993139-1938-4ec1-baef-e385533c5c2c/85095634728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a473fc6-3d93-4e71-a756-0fc38739e182/tolin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c199a903-34a7-4829-aaac-de6632571fc1/gorijas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b70249-eec1-4566-874c-17190827f345/rowirere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e4ab86-ad22-4a1a-ab77-ffd28106a03a/24184409977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061a22fb-b4ee-4416-886a-29b767fe0803/93099154801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7837533-7294-4cf6-b74e-8099b6678f52/2893189034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216b672c-b596-4cfb-a9c6-07978e924874/mebifikefawulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf88e67-e296-4498-9945-971d7b07836c/72668497852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcf1f9d-f8dc-4f96-8b22-bc930af24d22/38364341580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7a15bd-b9f5-4cc9-b517-be4d06c6a1c0/19127944273.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_off00007238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7238 5040 bytes
SHA-256: 07761487f208b93113f35ea04b0c650de1e8ca542096369bc3b47db99013fa02
font_01_sfnt_off00008341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 10588 bytes
SHA-256: 8a925a6d1bfc4190ecd04c0c2f8982e6907e9a36bde90deb802c3e918c9a93c8
font_02_sfnt_off0000a736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA736 16076 bytes
SHA-256: e50652907db2bc45b4da017945b4afd03174f172933881ae60240a6447644d12