Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9dbd470d197876d…

MALICIOUS

PDF

44.2 KB Created: 2020-09-30 05:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7925fefcdf925c44f11067be8cc87e21 SHA-1: eca8721abe5f2f023607dd44c845aaf60c9ff8e4 SHA-256: d9dbd470d197876d629bd7ecc8ecf9ee5e702e1135b0f3124a265ba1045554d1
124 Risk Score

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 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://ggtraff.ru/strik?keyword=linux+search+for+pdf+files In PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/61514803364.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/buxidebarabo.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/sogaver.pdfIn PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/bivuju.pdfIn PDF document text
    • http://files.wellesleyhistory.org/uploads/1/3/2/6/132680986/4652867.pdfIn PDF document text
    • http://sorob.rwbickfordconstruction.com/uploads/1/3/0/7/130739240/nijapozisijusulez.pdfIn PDF document text
    • http://files.bethelbaptistgso.com/uploads/1/3/1/4/131409055/vokegujubesowiw.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/fagobamolo.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/63989485470.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/60472657829.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/pariromikivenalewot.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/98979798363.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/11506191581.pdfIn PDF document text
    • https://site-1036950.mozfiles.com/files/1036950/21801555468.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/nomarerixax.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/29046768743.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_off000068e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E7 5252 bytes
SHA-256: 5bc90f65148258a601cef9db8381e48ef542353d42b1627e6a0cf5837a0df0fe
font_01_sfnt_off00007ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 12976 bytes
SHA-256: db5eff3492e85b23da03053d409ff20bcd0d1490ec6b67c58e1e2520a37776a9