Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7820003354fc416…

MALICIOUS

PDF

65.7 KB Created: 2021-02-19 15:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f037b2dd5ce94c0bcae10acf5ef19e4e SHA-1: b243d4a0ffd15264b6eb35f124ecec1ed83df1bc SHA-256: a7820003354fc416ecf3e7a3ca5f4c74c43d423fa16ceb35b5abe0a823a32417
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/wb?keyword=boruit%20headlamp%20rj%203000%20parts PDF link annotation
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/wokezi.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/bde73d8d.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/niritexomodaral_wezakirot_xebokujutofev.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/2438465.pdfIn PDF document text
    • https://jupoxoguji.weebly.com/uploads/1/3/4/0/134097256/741a0.pdfIn PDF document text
    • http://choosenews.space/55376629601wwvs9.pdfIn PDF document text
    • http://teachost.com/91862987370h5n00.pdfIn PDF document text
    • http://fc-aromat.ru/47158333398um5l.pdfIn PDF document text
    • https://raxuremaxu.weebly.com/uploads/1/3/5/3/135350699/6170836.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/cgiiic3/ribunu.pdfIn PDF document text
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/7806075.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/id5jhjg/wivebijizovu.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/0e8f76757130c22.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/cUjhbUm/best_lawn_cutting_robot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jinabisura/9872795871.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_off0000c23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23E 5628 bytes
SHA-256: 8dcfdfd5a7eea51d0d3983cf84b4656255208ea33fe69a7435e2000636db7358
font_01_sfnt_off0000d535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 10804 bytes
SHA-256: ad19f24a788e3eac678021141367c29c0d51a95d8a953f972dc8c64d901f5c48