Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c4120db62346cb…

MALICIOUS

PDF

72.4 KB Created: 2021-01-24 01:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b3dffe73021a802ec9fe48153c981e1d SHA-1: 63911e2fc0937e6c6c3692da074881e0958f6968 SHA-256: 15c4120db62346cb2b80f96fabdc638549114a9dcb9eacbc683460385091c0a9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wb?keyword=kode%20voucher%20game%20telkomsel In PDF document text
    • https://site-1178248.mozfiles.com/files/1178248/boonk_gang_songs_2018.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/vusemuwufodiw.pdfIn PDF document text
    • https://site-1172205.mozfiles.com/files/1172205/xatulinowaburofe.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/bewapeletepisawurazo.pdfIn PDF document text
    • https://site-1172875.mozfiles.com/files/1172875/86854858931.pdfIn PDF document text
    • https://site-1168018.mozfiles.com/files/1168018/xbox_series_x_for_sale_target.pdfIn PDF document text
    • https://site-1166732.mozfiles.com/files/1166732/setisawokataf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_600477e87b00f.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/tobufanenusora.pdfIn PDF document text
    • https://site-1221793.mozfiles.com/files/1221793/wimalozorenuwijokudoramu.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/bijizawejoz_vusuxijefum_vovuf_fegaza.pdfIn PDF document text
    • https://site-1176426.mozfiles.com/files/1176426/86611031218.pdfIn PDF document text
    • https://site-1257572.mozfiles.com/files/1257572/office_2019_home_and_business_trial.pdfIn PDF document text
    • https://site-1168221.mozfiles.com/files/1168221/sample_china_visa_application_form_malaysia.pdfIn PDF document text
    • https://jujokubibafa.weebly.com/uploads/1/3/4/6/134621517/90b4953104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 5444 bytes
SHA-256: 4583953eaa28f141c3796ee297e7afd9641c74576436fc0931af92f9719baa3d
font_01_sfnt_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 10844 bytes
SHA-256: 3ba578c6f2f56cf14c0dd21862f257b1987800b9e14da072beeb1d074341a015