Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bd7bec4f45d408…

MALICIOUS

PDF

68.8 KB Created: 2021-08-22 07:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2dbf3daf2512c56a6f2c5562702d9006 SHA-1: 9eeadf0bd604779b2499aa51fa454498401b340c SHA-256: b2bd7bec4f45d40887e8dc433bdd813e6a472e8864e4e5b5f5852977bd63f45c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including ClamAV, as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These sites host further PDF files, suggesting a chain of redirection likely intended to deliver phishing content or malware. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

Heuristics 5

  • 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
  • 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://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f20e37d888b83e915727366d1c3cc2ea/25516485394.pdf In PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f11d78311c1---96913189611.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/96cfda9dfb0e65bf7021d4421aed13e5/keniwubuginukogufowov.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/22179222978.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6030556517---9049059469.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/xomulufovorow.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be18bc5693---33462052164.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/9d214ee18c381172f038f5b732b0d36e/96786327378.pdfIn PDF document text
    • http://keitbg.com/images/files/45745908775.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/59836005817.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/pidezenitarimuxedalas.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b692772f9---fawivalunakukejori.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec6b207f2c---kufuse.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/47a2728bce8e2d8bdfccf705804c7a81/91625777883.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/91616251614.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/ditazuzibipipotegerired.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/77887737707.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/89931123561.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2ce328cc8---jizapulowaw.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6766f59792a453937beaea493d5efc5c/32823016299.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161197aaf788bc---wesugidazibudasevawi.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2bb6c7052---21352271582.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608294e8b0043---75983004041.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/66118428459.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/350fc5162efc6107e338d52f29247a89/sowuvefinonotigafobuzurek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=kuta+software+-+infinite+pre+algebra+slope+answer+keyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 11088 bytes
SHA-256: e07a1687af6dc58e1c1c54e6f3edfa71baeb96fe8e187910cf51979039d38623