Malicious PDF — malware analysis report

Static analysis result for SHA-256 e807d55f240ee33e…

MALICIOUS

PDF

92.1 KB Created: 2021-07-13 03:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d5b73386ea9f215f16cd8457d68b5de SHA-1: 91aaf2b761eb9ddae42892ae386c9cf7112ac565 SHA-256: e807d55f240ee33e8e8ce66f5845b8f806a35a155f2b7615321de2f7101e80aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage. The presence of embedded JavaScript and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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 https://drafthe.ru/uplcv?utm_term=rainbow+experiment+for+kids
    • https://jdlpartnerss.com/userfiles/file/gewirej.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1c1306d95---gadinifudubegogoxenopa.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44dd254d01---60486831071.pdf
    • http://krakow4you.pl/krakow/files/vakijabikixuvibefudolejaw.pdf
    • http://chroscina.com/userfiles/file/gikovazesukufole.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/rozotojefojimubajuwasomi.pdf
    • https://doctorchina168.com/upload/files/73115068315.pdf
    • https://ludifrance.fr/userfiles/file/ratuguvakuru.pdf
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/fobev.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c553192742a---zojaviwom.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d428113e4c---74627730138.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608521453975f---46976739049.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/nuravuzakikenasak.pdf
    • https://ebooksweb.net/files/file/800599670.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/j0bu7ai3v193god2ocuatj7lk5/6216358743.pdf
    • http://mikomisushiwc.com/uploads/files/wevejelaregusus.pdf
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/fogipuwizadomi.pdf
    • http://graham1978.com/clients/79565/File/46739048213.pdf
    • https://dodatkireklamowe.pl/web/uploads/files/maritobari.pdf
    • http://erbaytag.com/resimler/files/zigudoxelejijabotew.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98a394d1b3---25015369366.pdf
    • http://euhoca.com/js/ckfinder/userfiles/files/93731641400.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd7cc7c30---95138437126.pdf
    • http://jatyn.cn/upfiles/202106/file/1624354560.pdf
    • http://caopump.com/admin/userfiles/file/81487585242.pdf
    • https://bhavalaya.org/ckfinder/userfiles/files/83974893736.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99f17cd125---julibov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec24.bin
847f00091ed8f4b4d53ede81a88aa3de83ee6243c6a7df137c766cba0b044cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 17360 bytes
font_01_sfnt_off0001197e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 16792 bytes
font_02_sfnt_off0001318f.bin
c853e972a77734140f0e5645ae449ba76d715ebaca0b8449579c89ad1a5e1de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1318F 16672 bytes
font_03_sfnt_off0001485f.bin
5bc4c32764aa23f936999bb57ed9edbf9ec5e6bda4e1b6d5fa9f8bc3c866c59b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1485F 11076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.