Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b8c1ae30584112…

MALICIOUS

PDF

38.6 KB Created: 2020-10-01 19:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6ccc2d6f455b7e9d38d1a6ea9348c932 SHA-1: fad1445713fdf8ed88cb8119d3924b47d8778b7a SHA-256: 71b8c1ae3058411210a8d9209dcb34828155bb410f19ec96eb3f67ebb6ee677f
132 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=contabilidad+asientos+pdf In PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/sunojifonedijotufisali.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/2340513054.pdfIn PDF document text
    • https://site-1039000.mozfiles.com/files/1039000/14223221712.pdfIn PDF document text
    • http://direguduj.newtampapainters.com/uploads/1/3/1/0/131070340/dirafalepolol-pibamiwimuwax-papalujukov-lugoto.pdfIn PDF document text
    • http://jikuvu.rockcreekvillage.org/uploads/1/3/2/6/132681763/60f30994e2b2.pdfIn PDF document text
    • http://taladum.fctnbombers.com/uploads/1/3/1/4/131406717/sukor-dixanenivo.pdfIn PDF document text
    • http://zagul.madcatcreative.ca/uploads/1/3/1/6/131636772/d6ea058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/sotibufufelitadajonoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3252/7526/files/foxifuxakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0623/7604/files/55317609158.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_off000059db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59DB 4984 bytes
SHA-256: c440898ba4e57d56d4e6bfc861231a199d9471c29b382345b5a9803378d5f6ef
font_01_sfnt_off00006ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD6 10896 bytes
SHA-256: e073665301a161d27e69b89a2cb51bb3ad9b0a79558ec2c0c6eb93781d1c2dc4