Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f9b8bd5a655d03…

MALICIOUS

PDF

71.0 KB Created: 2021-02-07 22:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 632db35013698fb269d746359ea2f1d2 SHA-1: 81e06617cde34d034f19c810f5bc522af20b0d2e SHA-256: d9f9b8bd5a655d03319f734585aba6342dc4a46751cc3c16c56611c8fcae2163
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://crophysi.ru/123?utm_term=bill+of+lading+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_60143b29ef0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_600de6e839619.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/de76af22ac3659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_5fd86e3313728.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/5857157.pdfIn PDF document text
    • https://jabifuvos.weebly.com/uploads/1/3/1/0/131070291/7221885.pdfIn PDF document text
    • https://rudazijix.weebly.com/uploads/1/3/1/4/131453676/8933862.pdfIn PDF document text
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/kewepot.pdfIn PDF document text
    • https://jaxifojuw.weebly.com/uploads/1/3/5/3/135351184/4482309.pdfIn PDF document text
    • http://fikapopupalake.iblogger.org/kafakuzomepivixusesodatul.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/jaketanufadidipar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buweweja.epizy.com/5th_grade_long_division_printable_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/guideone_mutual_insurance_company.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/87859313777.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/human_anatomy_and_physiology_ppt.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_off0000db55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 5076 bytes
SHA-256: 02e8ad5842ab375b28f66b652bb83c59da7b3de362af31320176527114899e36
font_01_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10164 bytes
SHA-256: dd3dd103f8fe69b3600331ff616b8630e7f88ff4e61e67a6fc2871dc732176c0

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