Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b5fb2fce06e2a9…

MALICIOUS

PDF

57.5 KB Created: 2020-10-04 02:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fd13f0706f8b92dcec524d23ee3ee4d2 SHA-1: 14c8aa4cca696d87033f35b9cd84b4d11a292cb6 SHA-256: 09b5fb2fce06e2a9d96fd649fc1fa481410a4d54431a33442bb59042db1ff8ea
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=alphabet+hebreux+traduit+en+francais+pdf In PDF document text
    • https://site-1039226.mozfiles.com/files/1039226/9082499042.pdfIn PDF document text
    • https://site-1040998.mozfiles.com/files/1040998/kogavajogu.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/7462571542.pdfIn PDF document text
    • https://site-1039918.mozfiles.com/files/1039918/xutowaxerowuvegafesitam.pdfIn PDF document text
    • https://site-1039646.mozfiles.com/files/1039646/xizap.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/zalixib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/what_stores_carry_nutrisystem_products.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/sorosewoxubumole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/hospital_pharmacy_policy_and_procedure_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2187/1522/files/81056757627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8428/2008/files/marcus_cinema_pickerington_drive_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a47912-99ef-404c-abb0-31502e4fd2ea/fukasigazavikibobimaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed62dc59-35c9-4ebb-a794-a3deac61a743/29359398692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883c04e4-8143-4220-aab8-a5a78d8cd439/4630212503.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F90 5212 bytes
SHA-256: eb066adf5fba7fc7fa9d854257d7b4adf102cbd69d34e57f07a92261fa222852
font_01_sfnt_off00009134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9134 19400 bytes
SHA-256: 2f17721672c73f2ccb90f291debf180b4525005ebfdf9e5079f7bfc496373e8e
font_02_sfnt_off0000c8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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