Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c9157e98b1091b…

MALICIOUS

PDF

66.7 KB Created: 2021-02-18 06:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 296bd6128b2f0836751f3ce74fd796b3 SHA-1: 65348f3625001e31d2594cba82157938eaff2448 SHA-256: 11c9157e98b1091b0881e6cb2beee65e6a4ebdda9a8ef0ad3d45f23932b86389
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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/wix?keyword=chemistry+solubility+curve+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_6027eb50a0a05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_6024b59c58a59.pdfIn PDF document text
    • http://lightly.store/wuligapimegimexefxxba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fe82aaec344f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_6024788be722b.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/hbhc3hc/1390700310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446015/normal_5fe044d2409c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378167/normal_5fe2a080329ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_601048d8c088b.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/fujadabez/18mm_chipboard_sheet_sizes.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/calibration_procedure_of_ph_meter.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/amal_carb_tuning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/9624550158.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/45610076224.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_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 5192 bytes
SHA-256: cbb7a16b1f9a8a0f7c4fcdc40a6e002c6668c2fbf5ca2222d292a06a8432b146
font_01_sfnt_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 9712 bytes
SHA-256: 4e0092777fc16698007847244a0c22207faaef00cb12a2a9178cdff2133cafb5