Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e17c9205d75bcc6…

MALICIOUS

PDF

57.3 KB Created: 2020-10-07 10:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: eb7d47845440c088e75f5ab54cb74a53 SHA-1: ea728b80002e0275bc2ce5873dae952f5d7de8bd SHA-256: 7e17c9205d75bcc6a6a217f001da90f567d0467564cd3d82aa6db133de08d921
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://gettraff.ru/strik?keyword=pharmacology+of+antipsychotic+drugs+ppt In PDF document text
    • http://files.vergelearning.com/uploads/1/3/1/4/131407698/d1993fbe416908.pdfIn PDF document text
    • http://zuduse.kentcountycustom.com/uploads/1/3/1/3/131383514/basevexumonifaxe.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/1/0434/5046/6454/files/91120448732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8122/3336/files/walujiviza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8670/3512/files/wisigubusaxegafelogovek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8573/6357/files/breathe_easy_humidifier_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9a624e-dd23-4e3e-8e3d-f7ea5b7960d8/vefikolupuluroxuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f231f693-d536-4d5e-b65c-880d92a74aef/xowut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531bd3b1-ceec-46fe-9bdd-ed9176160f53/1973995851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba786a4-2065-406e-a7fd-96c15f640e5e/38296638807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fdbed8d-164d-450f-851b-9aecf86b0f89/94631208632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b14d79-4dc1-4eb8-87e4-93bad36b1837/93269833344.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_off0000a17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA17A 5672 bytes
SHA-256: 94f39dae856d5ca04fe21796ee853bb69ae8727960d14708779e5031df76d8f4
font_01_sfnt_off0000b4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A8 10324 bytes
SHA-256: fccb52ef1ba98166334cd3ee56c3746a43ba339fbbcc225ca03680999350a3d1