Malicious PDF — malware analysis report

Static analysis result for SHA-256 303b6081912c0116…

MALICIOUS

PDF

64.0 KB Created: 2021-08-02 01:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b19601740f2f07007b0910f9d3715e5c SHA-1: 6d5c4e54dcd93b0a421676dc85ed25a7660893a9 SHA-256: 303b6081912c0116fca12ded93a2050d22c4454f8ebf3358598841f0f165f24f
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9770

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://economiadecomunion.net/ckfinder/userfiles/files/77573638992.pdf In PDF document text
    • http://krossinkeuka.org/clients/c/c6/c64aa726effa6776341672ea469011e7/File/43476877838.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/78586455438.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/lagaxibumaliruraj.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/delipetawo.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e60814015---77322712411.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608252b5dd9ef---gavusap.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/dc19c57a1584f5fdeea815bbd000e5da/75672672157.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/2bdb3085bd860d0180d932edb9906619/15991497902.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/76198327161.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b68564795---bogoviwudunume.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/tixijilidaler.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/19143859846.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/34857345596.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/35132750768.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-7-28/20210728030908388520.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/26e8ba0d9ae12ce8803b45be3ee00982/babesonas.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee0a28fff6---zepedavokolikirus.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03efadeb16---91460819426.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160983bd66fe04---37601142513.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/id45sd1j332d0e35ku2ldjjj01/31743626245.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/92050643819.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1109c0903---lekajesofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+disable+lid+lock+on+maytag+washing+machinePDF link annotation

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