Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa498796b793325…

MALICIOUS

PDF

83.2 KB Created: 2021-08-09 11:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b9502481713cea7895854581e4c7e6d SHA-1: 14a50002184e9ebc0cf67c43d02de732164d7c26 SHA-256: faa498796b7933258e734b44672a086f809cebd98aa69e3396d9fa45deeadc01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which appear to be hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9394

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b070a692fac---lanodiwinorobexogadelifu.pdf
    • http://studiosimonepantaleo.it/userfiles/files/nisilozonimuzij.pdf
    • http://myjobcareer.net/userfiles/file/2021071315333073499.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f638f01a---85586152370.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/50pqpbff83qsklfm0dgrga1u33/delorim.pdf
    • http://e-cluny.cz/UserFiles/file/89653345374.pdf
    • http://cedarvalekansas.com/clients/875954/File/54233999823.pdf
    • http://fxmeat.com/upload/file/7d6ff9b7c1fbad562248cba2b619ba7d.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb32ae5f7---wejoboxidowofupige.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/bc9291f555927568a911dfda6d7fb55e/75432967649.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e3f49d788f50ae7ed796948b40f73723/lunizatuxafogizejuzefu.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65a8663b7b---32165652224.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/00d7223ef14e6e383e1f977d04c51a56/88348543315.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160e441d6232ce---89875381831.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/122de42dc6ca8f35ac8f348a2ef6924e/sojalaweb.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8605eaecafda54e1b6fc81d76e801fc5/45134345822.pdf
    • http://yogo110.com/userfiles/file/vugovujeliroz.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b625f24e94b---xesogulel.pdf
    • http://cuatudongnhatrang.com/uploads/files/19201017946.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc6c0271f2---66283153007.pdf
    • http://sequoia59.com/clients/867919/File/26486084813.pdf
    • https://hosrem.org.vn/ckfinder/userfiles/files/98909217591.pdf
    • http://jp-cable.com/d/files/jifemujozupuw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=asme+y14+5+gd%26t+standards+pdf
    • http://irodori.kir.jp/files/file/nakolifofiperexime.pdf
    • 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_off0000ef70.bin
6689f8cd61eee4d3d6a226db46ab776d4ddc6e23def98948d75320bbd4723ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 16812 bytes
font_01_sfnt_off00011b7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7D 16792 bytes
font_02_sfnt_off00013394.bin
4dcbf21a90dc19eeb78fc873f087d47440dedb672ad17f36018151844e69f190
pdf-font-stream PDF embedded font (sfnt) at offset 0x13394 10228 bytes