Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f25b59f8920de2…

MALICIOUS

PDF

113.1 KB Created: 2020-10-05 09:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d6a10f2efa982ce538c4877b083b9943 SHA-1: 34dba070f93261e7781f29b8d772738ec7e82940 SHA-256: 45f25b59f8920de2c58751102c3e610f26f426d34625c42a3408c385c063b835
122 Risk Score

Malware Insights

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

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 0.9921

Heuristics 3

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=script+rpg+maker+vx+ace In PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/biwal.pdfIn PDF document text
    • https://site-1038552.mozfiles.com/files/1038552/kabajaxe.pdfIn PDF document text
    • https://site-1038599.mozfiles.com/files/1038599/mikofogipa.pdfIn PDF document text
    • https://site-1038920.mozfiles.com/files/1038920/zizejulumab.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/43192410784.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/77657922200.pdfIn PDF document text
    • https://site-1038517.mozfiles.com/files/1038517/rilidiwabumofid.pdfIn PDF document text
    • https://site-1038982.mozfiles.com/files/1038982/kenuvegegovonikisosir.pdfIn PDF document text
    • https://site-1043287.mozfiles.com/files/1043287/31065541804.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/gajisurozajomukariloziwop.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/wizoxebigiluxe.pdfIn PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/wowazixirebow.pdfIn PDF document text
    • https://site-1036850.mozfiles.com/files/1036850/58461575302.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/d0d5cef8-d3b7-4c2d-979c-a806b69048f0/jaziwokaganuliwete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b535e7-7dac-4628-9ccc-b8e62b0df71f/57714875174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a56216-59f2-4b83-8db4-6ff36b113372/moxevenom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3204f8-91c3-4a18-b53d-bd0aace4fb43/nilibavadokubuvaramipevog.pdfIn 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_off00018a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A35 5336 bytes
SHA-256: 9384a35996efef412ddebdd14d02deb11f46ade3c17516f5fe258d1966492ec3
font_01_sfnt_off00019c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C5C 16132 bytes
SHA-256: 710e9988de9e0d8871f4384457796e4fc00fdeec5a2e1127fdfbc2bbe10712f9