Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00f36cc014ee76d…

MALICIOUS

PDF

96.3 KB Created: 2021-09-13 07:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9169082eff2e1d0a8c241ac346927714 SHA-1: 0effe8aa84d918ab900e841a99ca7a52e60e3673 SHA-256: f00f36cc014ee76d1ac41f66e84bfc912d71b9017f336e0d3b5234d59e2f44b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, with several pointing to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=takipci+free+instagram+followers
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pg5h37h4t6rald2u8rntev2966/3819848683.pdf
    • http://thechitay.com/uploads/userfiles/file/zoridiwizobapodixaji.pdf
    • http://otestmanager.com/club/data/userfiles/file/20210911191514.pdf
    • https://liftsystems.ro/LiftFiles/file/70544818832.pdf
    • https://aordonez.com/images/contenidos/files/90130922230.pdf
    • http://wonderpanel.com/app/webroot/img/file/7809903709.pdf
    • https://twinslock.com/ckfinder/userfiles/files/faxipajedegopikoda.pdf
    • http://swaminarayangm.org/userfiles/file/27632551205.pdf
    • https://tjp2-hotlink-j3t.com/contents/files/xofewolazovufurava.pdf
    • http://omonetach.pl/foto/ilustracje/file/93868177459.pdf
    • http://uptownherndon.com/uploads/files/64331407086.pdf
    • http://dichvutheapec.com/upload/FCK/file/2012410390.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136a83b999f0---53508076089.pdf
    • https://coebmsf.com/userfiles/file/90048128210.pdf
    • http://only-svet.ru/upload/files/mirumanexeta.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/fejatugitir.pdf
    • http://vindindex.nl/images/uploads/kutisoz.pdf
    • https://vinacomvietnam.vn/uploads/news_file/94021663326.pdf
    • https://cottingham-group.com/cufiles/files/13862785454.pdf
    • http://stellarp.com/userfiles/files/jixekazikovoki.pdf
    • https://tarzminder.com/resimler/files/45039524723.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7e3000321---lavotidukuridira.pdf
    • https://noihoithanhtuan.com/media/ftp/file/jolexilifag.pdf
    • https://careerroots.net/ckfinder/userfiles/files/27435926359.pdf
    • http://totoquynhhuong.com/upload/files/zulom.pdf
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/34454618589.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001118f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1118F 16792 bytes
font_01_sfnt_off000129a6.bin
ee1cbd15d2095f1abb459b066812cd6415413c161d5a78f383fc555d48e73484
pdf-font-stream PDF embedded font (sfnt) at offset 0x129A6 10964 bytes
font_02_sfnt_off00014332.bin
a3883b0ef447baf1abb944d785cabb542ce616132bcf320ba7a0c948a5effcd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14332 18416 bytes