Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3058d9ba726313…

MALICIOUS

PDF

79.6 KB Created: 2021-02-18 09:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 945f72945d749839fd56ca8ddc2df9f3 SHA-1: 00d30ba9d2c8f85115754cfbce597e029648e828 SHA-256: 0c3058d9ba7263134f2fc09fb684040604232c28adecfa63f27ff12c571893fe
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/wb?keyword=vitamix%20e310%20explorian%20blender%20sale PDF link annotation
    • https://cdn.sqhk.co/zatufora/jeeFujj/didugizafavixowusoxitimin.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/c2gdBjf/45764046929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_60164a5fb3513.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452595/normal_5feeb5ca18425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_602de7005449c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5ff79cd838ffa.pdfIn PDF document text
    • https://fupefomaxoxaje.weebly.com/uploads/1/3/4/8/134897629/6393227.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/hhTsHKZ/zombie_motors_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/jbgjIgj/geissele_aimpoint_pro_mount_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/b5micgf/zodizafutaliroturefawu.pdfIn PDF document text
    • http://xikumidevulofo.iblogger.org/centre_formation_chaud_froid_nabeul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492901/normal_5fcc28f5a8fdc.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/zududube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5fd086fc2df1b.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/pefuvita.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_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 5636 bytes
SHA-256: 912bbee8f5a12e10487bebac48cdd53c7c1a38448d12be746ee450890e00dfb2
font_01_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 10976 bytes
SHA-256: d94091ed1af5ff3491516f2490240ec84bc91a92bce323cf78eeba821aa03f51