Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9c005aee048801…

MALICIOUS

PDF

69.3 KB Created: 2021-09-02 00:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dd229580c42a4e5a362ebd578de0b660 SHA-1: 7067b43dbb5b3ccfeeffa85ede069a97328ced6b SHA-256: fc9c005aee0488019545db54c1560401706bb3367ef8c2430f5f398beb38377d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many hosted on compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7138

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://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085c2904d909---34309098215.pdf In PDF document text
    • https://psychologgia.pl/Upload/file/78695637359.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca24aaa884---85368325789.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/2206133547.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/3edbc5736d56a25be2adf0fe372f7f6f/20280173483.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/54376833575.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/waguf.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bab0fd59fb---lurigusipugulav.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/safefimegirowexej.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/a7un6sejtdhvtmn6444ge03f25/dadoli.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca81b7229---44561463143.pdfIn PDF document text
    • http://accronline.com/userfiles/file/77933045718.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8ffdb8d87282deb6b7d3c62d3eeed27e/92455406169.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16084c8e7320b3---laruxitemejojalowotevife.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/gaxafa.pdfIn PDF document text
    • http://artediapharma.com/upload/files/xogid.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/veweni.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0747ac316---gesatudi.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/3ibbmj3ulmbgs5ek3dq3ebcapr/85715017198.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/venalijosar.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/79179631181.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/17368371901.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/rezaxaroferinabewavej.pdfIn PDF document text
    • https://chp-travel.ir/data/file/nalajulejakesofulesatalij.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ruvuge.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bcdd7d659---44047038394.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=list+down+at+least+two+examples+of+baroque+musicPDF 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_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1