Malicious PDF — malware analysis report

Static analysis result for SHA-256 94332d6f84abb685…

MALICIOUS

PDF

42.2 KB Created: 2020-09-30 09:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d193a9da91a6e0587c5cca100d8b7a35 SHA-1: f74537c0338d4d4b356630543273c552e2aa27f2 SHA-256: 94332d6f84abb68540d1ed4ee2496cdfd06e233db9fdca8513b7725bdd09ad20
184 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.
  • 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.
  • 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=after+the+love+is+gone+sheet+music+pdf In PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/13151583393.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/62492560061.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/nanavediviku.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/namele.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/62742675201.pdfIn PDF document text
    • http://pogefow.aspireinsurancegroup.com/uploads/1/3/0/7/130776131/bokuxake-detubuv.pdfIn PDF document text
    • http://vufufor.keithreganofficial.com/uploads/1/3/0/7/130739101/garujitiw.pdfIn PDF document text
    • http://files.ifacsta.org/uploads/1/3/0/7/130740547/tenazuzofemut-vogesal.pdfIn PDF document text
    • http://files.jaibaidell.com/uploads/1/3/2/6/132681560/dfc6e92b49766.pdfIn PDF document text
    • http://files.kirschlaw.com/uploads/1/3/1/0/131070062/421213.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/1/0486/2708/9573/files/85173569835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/azure_cloud_tutorial.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_off000066cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CF 5408 bytes
SHA-256: 9a8e9f3491a2748f7e33d70c2b1b81bbabbec0f686e44b2e76e9fcfe29580a90
font_01_sfnt_off00007920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7920 10260 bytes
SHA-256: c4e85cc8dd1a3f5abf2b917763f1a2b02320360a3f2bd0f2139113a0b8005c30