Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92e8e57a7fca33a…

MALICIOUS

PDF

43.1 KB Created: 2020-10-07 06:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: af31e14069189651630c74fa848aa45b SHA-1: 5e4166572443a9098bc7bd52e78c7f625196710d SHA-256: a92e8e57a7fca33a42a6f1f06850c6250bfcb7ec25681b34e332f656ad977672
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://cctraff.ru/strik?keyword=jasper+report+export+excel+example+java+code In PDF document text
    • http://guravuki.stephenshhs.com/uploads/1/3/2/6/132695832/daburevavidop-gesezavuronak.pdfIn PDF document text
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdfIn PDF document text
    • http://bonol.castlebergcommunities.com/uploads/1/3/2/6/132681218/af17d096dee7d.pdfIn PDF document text
    • http://files.clove-and-company-music.com/uploads/1/3/1/3/131398093/jexumimusokitavoge.pdfIn PDF document text
    • http://rezegi.wilmcommunityadvisorycouncil.org/uploads/1/3/0/9/130969559/kedinu-nivipuwunukelet-kaludofomapi.pdfIn PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/23740226982.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/liwalutedozujexinabupesuk.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/dekal.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/0c26b58c-74c0-4098-9e51-f2fa6240bc81/77587073758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9521/5259/files/how_to_curse_someone_in_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/house_orlock_1d4chan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/5480280399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7924/9319/files/sunaxan.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_off00005a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A82 5412 bytes
SHA-256: d34e66a0c5542eb67276f3fe741705e663b905c0214ad9245107b4d55abc81f4
font_01_sfnt_off00006ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 15444 bytes
SHA-256: ab50f503584739b38e347110fda443a8138bb1f87cd6e37719d22b4eccaa29b7