Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e540980d67f6188…

MALICIOUS

PDF

41.4 KB Created: 2021-07-24 20:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 06df930d24cb930b4cff08de47377e72 SHA-1: 8ebd2e825751b9fd713f67c2eea688850716bed3 SHA-256: 0e540980d67f6188eda21331388b409b446a2e21c9e86e9e663681c41167ebee
174 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing attacks, containing numerous links to external websites. Several heuristics indicate these links point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7400

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://daotaonhaccong.com/uploads/userfiles/file/30476171112.pdf In PDF document text
    • http://kochamsushi.pl/UserFiles/file/tefefizuwegeris.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/beraxazufapetex.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160715d02a386e---tifojapowizokobedatojag.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609af53080770---xesivirujirozawene.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/38506063508.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/63355924174.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d9f00926a---39575119847.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/a8hvkoi6lrrml9445dl5d40bt7/tawubu.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/76977343876.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/c96df83d85e00b4cbf80270cf720fc10/76760947076.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8690c2a23---85864629939.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/81056469267.pdfIn PDF document text
    • http://klhl.com/userfiles/file/tidadadufudubomo.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/gejukarabuxem.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f89173d3a---63026546135.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72a114ce8---kunewotigesap.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/25d3uikka2638aoldgmv71qee2/85521522198.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/zupinagajaxoze.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/808aa2af1c589a5d196ddb006d3c7282/bibawisudinezubenilalak.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/lutisewozejigonowuz.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/53827784281.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/gunuxujuwerakimabasafibig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=aptoide+install+for+ipadPDF link annotation

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