Malicious PDF — malware analysis report

Static analysis result for SHA-256 44401372185942c8…

MALICIOUS

PDF

82.0 KB Created: 2021-07-02 02:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fe37d084bf717bfdc3be78da7eb5460d SHA-1: ef31667fdf168036ef8f6b6153be8979e9dc015c SHA-256: 44401372185942c877527c56f107b55e6471744898993ed43232af54e781f7c9
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristics indicate that the PDF acts as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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
  • 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
  • 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://whs1979.net/clients/65916/File/31538745592.pdf In PDF document text
    • http://adabaskimerkezi.com/upload/file/xuxolitiw.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1b9fbae613d3785587e2bdcf75ff1378/lisevovubesubujin.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/kujelapejebuten.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/xeritetazezafakejezumave.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c069a168d2---87838696506.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e018c733df---31385746073.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gisoluvaduzutik.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2c19cb28b---nusilelilonapawevuluze.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16098a596c3891---11757151573.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/rsq36kl46ocne4nki96qu5npoi/56771389443.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/bibojamuzigiro.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/2155396346.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/72102924136.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/werufelelop.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/c15c45f729d4bede946d66cc19fb3964/lumiruxakesof.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160847dc0a0424---lafalagikazavajipif.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091063e622b8---timupazomilusalu.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/68388113157.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/8ba18875e453bb8229e32f607fe09e6f/24168193655.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc610f63d52---jekevi.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/vatisinalawejesunabafodi.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852ca3dbe34---vegesu.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210524052040093.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c4cd0217beb276034b1e94f31b8fceea/73783717369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=science+elements+names+and+symbolsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 10760 bytes
SHA-256: 9c2a8818891337a913b8a370b1af02e5e8299f3175a63ba8151e6389f60e687b
font_01_sfnt_off00010f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F12 17248 bytes
SHA-256: 349d92e8819cd87dd458ce707ea5a2e3cf67c2847f4136205fa079106ff21c12

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