Malicious PDF — malware analysis report

Static analysis result for SHA-256 d272d6c4bb1b98ea…

MALICIOUS

PDF

67.4 KB Created: 2020-10-11 10:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: efdb63757b516548e249adf4c1af6161 SHA-1: 491830ac26850d8e4650427308f5eb4c909e0254 SHA-256: d272d6c4bb1b98ea47df535d85d4978680aaae01cd133856461b67222dc361fb
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://ggtraff.ru/strik?keyword=entrepreneurship+successfully+launching+new+ventures+answers In PDF document text
    • http://vijutobod.wjckreations.com/uploads/1/3/1/4/131453433/0e46909ab600c7.pdfIn PDF document text
    • http://files.dancynvending.com/uploads/1/3/0/7/130740127/miwizesew-pamibuziba-vebilopepix.pdfIn PDF document text
    • http://files.rjcmindworks.com/uploads/1/3/0/9/130969454/dijolifiso.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/25737180782.pdfIn PDF document text
    • https://site-1040248.mozfiles.com/files/1040248/marinufokep.pdfIn PDF document text
    • http://wurevam.goddessofnature.org/uploads/1/3/0/9/130969932/wopubixub_liwasijadibakof_welaz_kumejutumev.pdfIn PDF document text
    • http://kisimama.revolutiondancecompany.com/uploads/1/3/1/3/131382693/dipefoja-rolinegagopifok-tudugakaxoginel.pdfIn PDF document text
    • http://files.rochesterelementaryband.com/uploads/1/3/1/0/131071308/lubudakabokaz.pdfIn PDF document text
    • https://site-1038614.mozfiles.com/files/1038614/zinadurof.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/29529944716.pdfIn PDF document text
    • https://site-1040326.mozfiles.com/files/1040326/lomevagekuvaxip.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/burozinetujobulij.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000e32f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE32F 18204 bytes
SHA-256: 55a6751037382f317e63b9a39a36db01b4143c3245cceea02c134ce8f261fac0
font_00_sfnt_off0000ad11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD11 5488 bytes
SHA-256: 315a2916df2254619e1d9494db8273ccf3cd5ea780784bd6d660f8e23ecb57a3
font_01_sfnt_off0000bfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD5 10292 bytes
SHA-256: a7b9f6815dbb5f8e5bbb50d8ee2e7667a61fb8f8d5fed7094a213cb30a34abfa