Malicious PDF — malware analysis report

Static analysis result for SHA-256 d425e77b1443fcbd…

MALICIOUS

PDF

52.8 KB Created: 2021-09-05 08:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eb61b4eb54b38d71b3b280a4895142a3 SHA-1: 8fd8eb27afebd12171a91d9d3b26fb5e0d81cdbc SHA-256: d425e77b1443fcbd74782be30dee7ca1dcb028a7ffa2d82eb8713d9fc68c8901
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing or malware. The presence of external URIs and link farms indicates an attempt to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7016

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=marriott+rewards+benefits+pdf PDF link annotation
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc04302933---wafikuzodotujipexuxusubod.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ba6fb142a---69032404261.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e680360209d3c72273de9dc7a0c8af14/77992272320.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c80a85154795a9d08ebed16307e714bf/34807042042.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/pumobikegavoba.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/trn58ttss7fcchbcdirmg2l1gn/67416851424.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb22c61d1a---lufewaxo.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/70040410749.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/40094616866.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/69657493885.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/jawejekasolamotuwewa.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/kevuxebumixof.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a726f8b4ea---gilokedij.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/68956734476.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/jo55v1upemj7tohqmf4e4phsft/88213673313.pdfIn PDF document text
    • https://kildevangen.dk/files/nefizojawino.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612980f13b04e---beneguxunonave.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/71421842076.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/28054372792.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6997595138dbe6effa6d245367479120/87838575554.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/vawiroredeku.pdfIn PDF document text
    • http://stl-hk.net/userfiles/rojepusopeveduxepujopuje.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/35936693070.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/ba64a988a73fb9dee968d8b83b78ca6d/xevegofakivaj.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160bbf9c4c4354---fosozesuboruxakewo.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/cmom2qn042kmlsji4l4jr2dpj6/6825609716.pdfIn PDF document text
    • http://melz-feu.ru/upload/70895335063.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/lisila.pdfIn PDF document text
    • 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_off0000be18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE18 10664 bytes
SHA-256: 2a15b2c147215d7c6f520c9114fbe5950e09098db99fad4526f71ec9183192e4