Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f60479753bde9f…

MALICIOUS

PDF

72.4 KB Created: 2020-10-03 21:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 0ce58a89ff147cd37b6b6278d8d16be3 SHA-1: 0a03b756103642b5ba836f892fac575d88a1e3c0 SHA-256: b0f60479753bde9fddf1cc9e97dea4303729c435e13247fa880345cd41aafaaf
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=pic+microcontroller+family+pdf In PDF document text
    • http://wivupafel.fatherbrowning.com/uploads/1/3/1/8/131856331/4826230.pdfIn PDF document text
    • http://dovebew.sarahtheeboom.com/uploads/1/3/0/7/130775403/jatasodazurik_lometadimava_wopadakuxitu.pdfIn PDF document text
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdfIn PDF document text
    • http://files.paramountia.com/uploads/1/3/1/8/131856339/5925909.pdfIn PDF document text
    • http://barun.patricesherman.com/uploads/1/3/0/7/130738973/ffe0a4489b7e0.pdfIn PDF document text
    • http://zawufadi.westboroughasp.org/uploads/1/3/1/3/131398008/0dfbea06e36.pdfIn PDF document text
    • http://files.gillisplayandlearn.com/uploads/1/3/1/3/131398006/2205577.pdfIn PDF document text
    • http://jawubel.jericosoundsystems.com/uploads/1/3/0/7/130739695/gitusifikaxog_setixetebap_sesumanutuke.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/d6f0fd37-56e3-46ba-a0aa-e4d614009c56/bafij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4b2395-8f4f-498c-9846-c5c52795709b/gufojediduzugomefozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/pejixig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3664/1960/files/code_error_e_honda.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_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 5224 bytes
SHA-256: 2a846a51fd69f78d440c8d4f257b693ea9d05f196cac6a42f3b9de8db8cdbe79
font_01_sfnt_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 10852 bytes
SHA-256: d7688075dbc2f27ba148a992b97b60502edf991e80bdabc8c356275eb4dcd738