Malicious PDF — malware analysis report

Static analysis result for SHA-256 66587a2bc5eb6a4b…

MALICIOUS

PDF

73.4 KB Created: 2021-02-12 20:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: facd2dd22737af58f82a780ec460d06f SHA-1: 3e86147a278c470b44955dae38d1df917e7b518d SHA-256: 66587a2bc5eb6a4bae3072fa41133d4dcbbd39f359bf8c239dd56a5769344516
274 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://yafferge.ru/wb?keyword=teamviewer%20%20for%20ubuntu%2016.%2004 In PDF document text
    • http://azorocheat1.xyz/21945606401l7wfh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_601b976e1e05d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485157/normal_5ff693c304e03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_6014f0fa6bd3e.pdfIn PDF document text
    • http://rubeatyshop.xyz/citizenship_amendment_bill_2020u66ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500187/normal_5fffb3983662c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477886/normal_6003b25c63657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_6012dc3b138a0.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/xabanidaroginivaribemi2xt7h.pdfIn PDF document text
    • http://copriyghtconfirmed.com/the_great_stupa_at_sanchizlkaq.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/lizuseguwix/westlife_songs_nonstop_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/zezedafapekerirexudekag.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/kpi_dashboard_template_powerpoint_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/bonifumijisoresalixifapul.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/zeduriderowufasaxazafekug.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_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 5412 bytes
SHA-256: 7cbf9c7da3f95529c44b3dbc58ec601e3cf8ba8220ee1b9b79f4cc8c9f6aa2cd
font_01_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 11560 bytes
SHA-256: 2d6f822ccd0a793badf2bfd362054b3207df7b3a60f593350759ca4be8b2d8c1

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