Malicious PDF — malware analysis report

Static analysis result for SHA-256 0caa17ad9a3761b4…

MALICIOUS

PDF

38.8 KB Created: 2020-11-03 21:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 330f6913a3cf0d7204ef97805db944a7 SHA-1: 53525a7c6c5196c18c787e3724336f8d4a8d1e76 SHA-256: 0caa17ad9a3761b4360c4a8b294f05e20e463f8b73555c87f3e7b37e0f5b4f36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, many of which point to a link farm designed to host further malicious content. One prominent link directs to a known malicious redirector infrastructure, disguised with a lure related to 'The Umbrella Academy' release date. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to drive traffic to malicious sites.

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=season+3+of+the+umbrella+academy+release+date In PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/8f9ff40568be.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/babapexunapurafuve.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/de963ad3-c276-4178-9e12-0cfe21f02147/wabigave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734af867-5c9c-42f6-9c9c-6cc9dcc436e0/difogukutofeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21d6676-c3cf-41f2-b050-653f3bdd74d5/9295005253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461b2235-b445-4d50-901d-3edfa3d08131/assault_suit_leynos_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f8233f1-757f-48bd-972e-241c74b1adcb/68492916608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393db064-0187-49b7-8739-ddac94bd8880/3217003959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb7c84c-96b3-40ce-b69a-da77a0bb4d36/42323036789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db30e4ea-f7b4-4b5f-9b94-0e483f0ca3df/boxujelevajokufunupamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111bf5de-a182-43b0-a510-92dbad7521de/yamaha_rx-v675_airplay.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_off00005753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5753 5772 bytes
SHA-256: 696f6600ce87ba8fcde97458fbfb6547cccf380cf3f01cd8dafd1cb005429ecf
font_01_sfnt_off00006ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD1 10564 bytes
SHA-256: 2ca4971b5229eb55e10f26862ea42ef45b7486710121b9c080de0ae79b0bb708

Open this report in the interactive analyzer, or submit your own file for analysis.