Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bb3d12161b2000…

MALICIOUS

PDF

76.5 KB Created: 2021-09-01 04:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 38f964670fea160cb11f1bd811826918 SHA-1: 43bce710b7fec75c6f1fab2a55e6ea18e8ab0575 SHA-256: 32bb3d12161b2000ce07a5825cb1f97811cd75decadd9817d4806116c1e1ccd2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to compromised WordPress sites, indicating a phishing or malware distribution attempt. The presence of PDF_RANDOM_URL_LINK and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests malicious intent. The ML classifier and ClamAV detection further support this assessment, identifying the file as a potential phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8703

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b08df030321---masegulifomilukafanako.pdf In PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162650612167.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e904780a7e8---88635823997.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/24962037970.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/tunokutelojatalijas.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/14363135392.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/vuzagosemawu.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/xikuwuti.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e2e6a0947f---98120047383.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/xizedoledut.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/zorojenaxa.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/24314982897.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/35032379264.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/cfa27ebcc3ad6b1dc91cb5245eb32cbb/2949686845.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/pudunejenofaj.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/85382026975.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b12a859203f---82073488277.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eccbb9d614---kigufepodojifezuxipedeg.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/49022955845.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/he3crio9apk6alrk12tmtj0vp1/60813456628.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/f6ee2b0de266ac78bb8e26d5fbbfc784/pixaz.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/33355513974.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8afd92df5---kekipituzejada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=iq+test+english+questions+and+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 19484 bytes
SHA-256: 7d636ed61f3c3fd7cabbb45ced94feb2b56a24a0df2c3eee361d75fdee73ed5b
font_01_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 10812 bytes
SHA-256: b12d27d88c0851143fe030002d45a0f5eae5449886ec71e77c72f548a57497f4