Malicious PDF — malware analysis report

Static analysis result for SHA-256 95941b549cf353ea…

MALICIOUS

PDF

46.0 KB Created: 2020-10-04 01:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2c21711afcde71d3a1d43ea23428af73 SHA-1: 0842805137c20e4ccfe4145ddbf2c71679582978 SHA-256: 95941b549cf353ea544b5a6924f0e9beba31079fb1dbaab95513190ddc0e0b80
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://gettraff.ru/strik?keyword=bluebook+citation+online+pdf In PDF document text
    • http://files.biketheswell.org/uploads/1/3/0/7/130775286/silufisefotilatum.pdfIn PDF document text
    • http://files.laurainthelibrary.com/uploads/1/3/2/7/132712080/wizidogore.pdfIn PDF document text
    • http://files.stfrancismadisonchristlife.org/uploads/1/3/0/8/130814390/wutobize-zejevixenero.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/28897090747.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/91888267912.pdfIn PDF document text
    • https://site-1041207.mozfiles.com/files/1041207/nijiz.pdfIn PDF document text
    • https://site-1040775.mozfiles.com/files/1040775/jovusopoxezop.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/mewagovulomukumugajoxif.pdfIn PDF document text
    • https://site-1043646.mozfiles.com/files/1043646/63680230368.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/64703572590.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/nivakudosokutazumusexat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6979 5008 bytes
SHA-256: 7939b8b3e351b7de71c87fd0cbcc17cfde82510d98c0ce0572e7fdf424afa206
font_01_sfnt_off00007a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A93 10324 bytes
SHA-256: ea60386bb0273850548606e5edcb265ece2e34f5d0fdb2ba5a9eb2975b09748f
font_02_sfnt_off00009d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D97 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f