Malicious PDF — malware analysis report

Static analysis result for SHA-256 c979a25efd0288d2…

MALICIOUS

PDF

49.7 KB Created: 2020-09-30 20:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6bcac32db8436edc8f84e2069e82689d SHA-1: b67a639ccbbef732b4c7dd46ee95a5be1cba3ac7 SHA-256: c979a25efd0288d245315c110ecb15ddf291c11a4e683a219084b4aaa132cfba
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=cinacalcet+davis+pdf In PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/42476107632.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/41122092586.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/zimetudexaliretomozeduzi.pdfIn PDF document text
    • http://devis.discoverhispresence.com/uploads/1/3/2/8/132815176/gexagarokomogu_pejagoro_bunep.pdfIn PDF document text
    • http://regap.themixyouthcooperative.com/uploads/1/3/0/9/130969690/misomapaxanusowi.pdfIn PDF document text
    • http://files.erinzak.com/uploads/1/3/1/6/131607010/putilowubijufun.pdfIn PDF document text
    • http://novexog.reconmetal.com/uploads/1/3/1/8/131872096/wumama.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/mimevan.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/73705899825.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/61210027610.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/ronovafe.pdfIn PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/5008877329.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/3e9e8616-47f8-4fad-9490-1995a4b60081/36467624659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8074059-a86d-4cff-96d7-fec4f8a27703/dikerabufatuz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D94 5016 bytes
SHA-256: da5e62117824c5da46d3004eedfcfb81a0f72db9bc5e3230eb03d5ac25072f7d
font_01_sfnt_off00007ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC2 11752 bytes
SHA-256: 2884d1cff398feadc3f3da15d3a8acb87539360dcfe095c3b41b8c91dac692ec
font_02_sfnt_off0000a57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57E 16076 bytes
SHA-256: 329a2ad8375db4c835ca1b908318827b7826730af459423ce6470d445ef5a137

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