Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d0060b44d9500d…

MALICIOUS

PDF

84.9 KB Created: 2021-09-23 20:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6d91e18a9a0927533ba0a3aea47d52b SHA-1: e3a01474e0338bb19d69a939df1e1eb7b24c3e0c SHA-256: 62d0060b44d9500d0cacfeff41ea424a4e6397dc71e0aaa3274020323963c416
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage. This suggests an attempt to lure users to malicious content, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/9j0sntv598lp0442cdaaq4dg8f/fejenerarexojibodu.pdf
    • https://receptabc.hu/images_banner/files/69706652109.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161425eee999c1---96678908984.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/161381098ec4da---7244890163.pdf
    • http://hstechno.com/userData/ebizro_board/file/tepumexiwajeminep.pdf
    • https://livres-arts.com/ckfinder/userfiles/files/wazuxelufif.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/249d4e8901b97186f3e84f5c98674830/jutikivawerimifutemazewu.pdf
    • http://ovecollection.com/royal/admin/images/products/file/wewikagugaduzupete.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ce9dp27ngjvdifkkorbb0md86l/rofonodakodoj.pdf
    • https://tivicom.vn/upload/files/fitemotiga.pdf
    • https://floridagreatescape.com/media/file/vakenanuxoxege.pdf
    • https://u-spot.biz/js/ckfinder/userfiles/files/puwajanotalububuwufawenor.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/97236188214.pdf
    • https://moveo-sport.pl/userfiles/file/26881343401.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/309d5582e4ba5fd08383d1ce332b881e/vukotixu.pdf
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/kiwazadefifomijinazipana.pdf
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/98597274855.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161480a59cb68f---32493878375.pdf
    • http://synphabase.ch/upload/file/dopok.pdf
    • https://megatekspb.ru/sites/default/files/uploads/92779647468.pdf
    • http://splogservice.ru/content/file/ruzorovatumewekevazixul.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bd85801790621d67ee1b410b247b871d/65179362912.pdf
    • http://zhouzhuanx.com/v15/Upload/file/202194155043041.pdf
    • https://glearningsolutions.com/userfiles/files/45341080502.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=free+skin+in+fortnite+2021
    • 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_off0000e4fa.bin
540bcc8cfeeba1536066490ad8a3403b1a5ee1e7ae0e091339024012e11a1aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FA 18724 bytes
font_01_sfnt_off00011662.bin
1fef8fab743dad4ed7356aceccc3330f04cdb3aca36c98837e100db6febb0d53
pdf-font-stream PDF embedded font (sfnt) at offset 0x11662 10360 bytes
font_02_sfnt_off00012e00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E00 16792 bytes