Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd7d7de06afc8b3…

MALICIOUS

PDF

86.8 KB Created: 2021-09-15 23:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f9d158caf714a5380e7d459bc627794c SHA-1: 062ec04fe62ff774b8ef4fc6a7728d869583f66d SHA-256: 6dd7d7de06afc8b3eb3d90efa421265e415ee275ba0a2636366f2b831507a15e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to direct users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=top+10+multiplayer+games+in+android PDF link annotation
    • http://boldogelet.hu/media/fimurarudezoz.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b74f22da3a---garuribobejonolobil.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/savenevupu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/101866afcd564546b8c9041d0ded2785/wumozibejidoka.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/54395927128.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tumikalitebevo.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/43525251604.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/fisimapexut.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/zisirexira.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/jivipaf.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/69806031926.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/51287932464.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/sabjh3rgktpc2k2i2jcrftuq0r/67412841930.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6o80c4on66428k82f8i5ol1dp6/70903929662.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1631179019.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/85063143656.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/20741717445.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/tekutojaz.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/72277351992.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/tudevumazisuresafi.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ce8p00bo3p0a465dv9v4q8ul17/buwavitazosotu.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/29159119730.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/refizelazaf.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/28589486114.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/22901893828.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 16664 bytes
SHA-256: 75deb8c9d85d7a502fe2b5a2bda4deefb008286e326e028ab5fa20535d5a1f16
font_01_sfnt_off00011bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C2 11088 bytes
SHA-256: 80bd8a495b55ae9ffe94bcf3d97e5ca1ffb97802b2a2830cda58fbfcd861afb0