Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce68b950eefc70a…

MALICIOUS

PDF

74.0 KB Created: 2021-02-26 06:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd721fbb74078eb162983228a988c2fb SHA-1: f58cbc6a4d556f0314e2c27d8ed0a2a837bb8638 SHA-256: 6ce68b950eefc70af011d4c184a1486fbfe868e7c0a3f6c7345472f36fdad53e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://bologen.ru/wb?keyword=who%20made%20the%20act%20of%20uniformity PDF link annotation
    • http://hyipinvest.site/standoff_2016_castrg04d.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/demefez-pujil-potuwiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_60052272346d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_6036d94c3df03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_60196500e096b.pdfIn PDF document text
    • http://matras-24.ru/tidesadijifaxexujal93rn.pdfIn PDF document text
    • http://brumbum3.xyz/63177538457r2lko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_602c276bf07c6.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/podexubinida-gixave-tirelutojax-vovitogekodo.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/jtjajjh/photo_background_editor_for_pc_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386605/normal_5ff158a2a533f.pdfIn PDF document text
    • http://salearea.pro/zivonobivipuvafuajw6l.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/4412217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_60186ca743a7a.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/zupenafud/poxafudebenijixetodarozav.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/tng_yu_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/bojibutemolobaxuduzixu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/fadexezi.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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 5168 bytes
SHA-256: 69c39ef55c0be7c4f6bfea446dbebded10453f6f12a994e3bb6ffac050d60f6b
font_01_sfnt_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 11312 bytes
SHA-256: a5714f0f7bdcd6d2e6ef20ea49559c87a415da3ce7b94087ae74fa39bc340547

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