Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c29c7aef48eaf2…

MALICIOUS

PDF

158.3 KB Created: 2021-07-23 06:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc22582ec1ebfc69316cab2dd5b87411 SHA-1: e1b50557b941a245515928c2bbf8cf02a2270c3d SHA-256: 43c29c7aef48eaf28f442da9b69a8563c6f73928deb9f61aaf89c4044b904f1f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites, specifically within the formcraft plugin's upload directory, suggesting it's part of a link farm designed to distribute malicious content. The presence of these links and the compromised hosting indicates an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9315

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://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ee33c3b83---domigenolavif.pdf In PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910a46f090f---butuzomipedofipetimibikok.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/mapodoranuv.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/tq45boovd5gh60472buvnttmm7/vukugefuj.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/21189329152.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/zijiziranajotus.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3671548ae---reduvokazubezene.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/33315732074.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/tamor.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/m9oerk0692tlrfoan8mngreesp/sawowulefi.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/4cp1ebtu14p6c6jufdo8e9hda4/70176141930.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/55247970893.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/22cbd8e6c44fc1434d9ca5645457dca4/vowixowodetukawewazep.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/47b8176bdea3c1fe5e80af3e220d4291/92818108618.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/73531788560.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3f5283e8965d8ea62dab4c3437faa5e1/89068656678.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/minimeniji.pdfIn PDF document text
    • http://jfe.hk/userfiles/mowujomagowoligimu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/128e0e9dd568034fc06f59284a61d19e/wesilajika.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00bf8c6742---buratabitaxawepebikexikiw.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/zexase.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/misusivareguxiborawuxo.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/rufirigopajuxewil.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dbdc5bca0---bojipogor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=that+time+i+got+reincarnated+as+a+slime+11PDF 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_off00024e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24E34 17048 bytes
SHA-256: 16faf103b584923f7e7b1836fcf2a28f777b657cb6e82739acc6f9aac994a34b