Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a7ca9fb2134a9b…

MALICIOUS

PDF

63.7 KB Created: 2021-09-07 17:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 804b96c80e86769568cd81ac89de5d6f SHA-1: f2fa50679ac5876d1057b2e99a7e4386c7eed7bd SHA-256: 44a7ca9fb2134a9b587d89d0399c32a4baa75875c1f04300d5444cefd30f420d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external URIs pointing to various domains, some of which are hosted on compromised CMS platforms. The presence of multiple links and the nature of the URLs suggest an attempt to lure users to malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7802

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://cructi.ru/uplcv?utm_term=leyenda+de+la+planchada+corta+pdf PDF link annotation
    • https://pet-fashion.ro/mm/file/popugilubozinitulezonuvo.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/lasuxeniwafa.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/jijixoratititegisi.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/55639245448.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/dumerubowujebafajagir.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/dudok.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/68881583477.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/zosejuledipiver.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/42535302386.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161004ca0c76cf---pegironi.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6cb830ac1---18417008633.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ca92ee83---gafiratitibunovukegale.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/8550279525.pdfIn PDF document text
    • https://samowar.ch/upload/file/99665057248.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/54093137999.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16072fdd43365a---lolesas.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/62513351363.pdfIn PDF document text
    • http://sakra.sk/storage/file/46794524542.pdfIn PDF document text
    • https://majubesar.info/contents//files/mafozixef.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/c4bp066vbeeaqqicvmn11k95lp/juxipewovinolabar.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/b0bcee2dea588d8c03f20a470f3be07b/sowabole.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/timumove.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_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 18532 bytes
SHA-256: 7fccb7d0038a2d709bfc2a142e9a6c02ef301d6ad7dadc4eedaffc630323b2a5

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