Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e3943dda90bee0…

MALICIOUS

PDF

51.0 KB Created: 2020-10-03 04:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8aae3ad4fc68c0c8f54608766f5d8f79 SHA-1: da15166f85e001d4c7ffa0b7eadd9c898d2f11c9 SHA-256: 75e3943dda90bee01dcd32a92b18f6f6d38989bb4f41bf7f1fddab6b89fa31ff
132 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=boxtops+for+education+submission+form In PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/vademu.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/taruxivew.pdfIn PDF document text
    • https://site-1042442.mozfiles.com/files/1042442/37093011649.pdfIn PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/lutepod.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/jomagexe.pdfIn PDF document text
    • http://files.smartfirstaidcprtraining.com/uploads/1/3/1/3/131379266/2267213.pdfIn PDF document text
    • http://files.ibrahimsaidceramic.com/uploads/1/3/0/7/130775634/2249903.pdfIn PDF document text
    • http://virirufod.barboursvillemoose.org/uploads/1/3/0/9/130969461/9924212.pdfIn PDF document text
    • http://files.mad4mosaic.com/uploads/1/3/1/8/131871537/doxudonoxatojus.pdfIn PDF document text
    • https://site-1042023.mozfiles.com/files/1042023/82111897501.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/zorobudusirugijufipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00008984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 5528 bytes
SHA-256: 5236c63fd79a3ba1ad4ce5da0c01019ba84c3a50c0913a5a2111492692e64931
font_01_sfnt_off00009c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3A 10332 bytes
SHA-256: 87a7001b51b2935d657516b323998307cb133fcb26fd555012f67327bea5ac47