Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac98905bbdba0ee…

MALICIOUS

PDF

38.8 KB Created: 2020-10-31 21:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b24c520e442efe710fd25e78c8494df3 SHA-1: 5994551d1d1b51b8153fbe5f5b2c22c19c178486 SHA-256: dac98905bbdba0eeee61fb66c7d3aaa0265d7a301e0ba754d7cf6b64eafdd12c
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://cctraff.ru/pify?keyword=rock+and+roll+velvet+underground+tab In PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/897510.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/9038680.pdfIn PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/3293014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f8a238346fb1.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/jojufopolog.pdfIn PDF document text
    • https://xuzelete.weebly.com/uploads/1/3/2/6/132681171/701b5.pdfIn PDF document text
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/zujorosajiguxoxigi.pdfIn PDF document text
    • https://jupovibofekek.weebly.com/uploads/1/3/4/4/134490290/jowip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f88c4259748b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000058a4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000058a4.bin)
    • https://s3.amazonaws.com/libeganot/23646959699.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/reverend_parris_the_crucible_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5290691-ab56-4164-93ad-0ddad8bafa28/ankita_dave_porn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b536fbf-ea2e-4a19-8a16-e3cd4e39b06c/14061544254.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 extracted file (font_00_sfnt_off000058a4.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A4 5200 bytes
SHA-256: ed655d4ba2ddb9bed221d6dd18e2a21467b17b0e44d6c9a4021f4ab77ddfb84c
font_01_sfnt_off00006a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 10564 bytes
SHA-256: 4ec34afaca7bf0d4a10b92829a2fada2fa6f50955a7245e83b0d84eed2089324