Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3c8a11420d9c83…

MALICIOUS

PDF

61.5 KB Created: 2021-01-16 18:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 10ee2cf063309efb300b61bfed8ce0e7 SHA-1: 71b484f83a3183e9e2a5bc3f856c7e0e5b1cfba3 SHA-256: 9c3c8a11420d9c8364a4d531aac549a1f61efb3b9da5cbe6fb963be798d46c7e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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/wb?keyword=living%20room%20layout%20ideas%20with%20tv%20in%20corner In PDF document text
    • https://site-1176294.mozfiles.com/files/1176294/zadewusisosol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_6001f2ad3060d.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/fusogawovirapof-depitexodi.pdfIn PDF document text
    • https://site-1252463.mozfiles.com/files/1252463/felijokuxigi.pdfIn PDF document text
    • https://kuxorife.weebly.com/uploads/1/3/5/3/135313812/radomexipetope.pdfIn PDF document text
    • https://levoveto.weebly.com/uploads/1/3/4/8/134897684/lokove.pdfIn PDF document text
    • https://site-1251451.mozfiles.com/files/1251451/agenda_settimanale_2019_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5fb8f1d32ff3d.pdfIn PDF document text
    • https://site-1244465.mozfiles.com/files/1244465/xiputepozafifazilogejuno.pdfIn PDF document text
    • https://site-1178374.mozfiles.com/files/1178374/bejirujuwuwugijinini.pdfIn PDF document text
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/wevatedivafemozupuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488558/normal_5fcce1a518b42.pdfIn PDF document text
    • https://vexapezerizerup.weebly.com/uploads/1/3/4/7/134717078/e1e99406b376b.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/sigobija/15126946140.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/chicago_bulls_schedule_2019-_20.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_off0000b4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F5 5548 bytes
SHA-256: fa1d82162d8aff15cb134e12a061247d3581b487f8d3cf198b62348d4a000ee3
font_01_sfnt_off0000c7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C9 9768 bytes
SHA-256: 69b954e2d61be8bd33588156c2e668b905827af245cff896c2bccf179a3e6eaa

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