Malicious PDF — malware analysis report

Static analysis result for SHA-256 97981130709288fb…

MALICIOUS

PDF

75.6 KB Created: 2021-09-16 10:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fdc60f6155fcddac2d3c41cc48e0e675 SHA-1: e453f8447d8f78347cf4357dd99cfdea90ef69de SHA-256: 97981130709288fb2fa4b7c659ea950175b2f3620467b2519946c568fcafbeec
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document's structure and embedded links are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4683

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://synerhu.ru/uplcv?utm_term=how+to+transfer+mp4+files+to+android+phone PDF link annotation
    • https://xistenze.nagydavid.com/files/files/46640236536.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/xovomibubumuxalimogodozal.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/70399871908.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/15961693006.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/70511663054.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/momosuboji.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/lukenogajaruzewika.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/j3443furl2g3tdfnfiv3d3pero/78692084922.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210911_89C4BC287843BEEB.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/veneburebotem.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/19336676159.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f09c5cf27c---gebuvaleroduwabowu.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/neposowota.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/dejoxipuzexo.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/tikanogigiditi.pdfIn PDF document text
    • http://arhive.np-sp.ru/img/file/92100581802.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141788c2efe2---82785374402.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/jobazebufagudera.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/45712471377.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e57bbec9b---48103696344.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/14927136018.pdfIn PDF document text
    • http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/tipawawada.pdfIn PDF document text
    • http://kebecelectrique.com/upload/editor/file/nufafoniduton.pdfIn PDF document text
    • http://apismorava.eu/docs/96892570250.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/wewodumedi.pdfIn PDF document text
    • 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_off0000d9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DA 20744 bytes
SHA-256: ab80e74a8e63f91ed5f84d78aac34d145e7ae914643b0e54a813ab33d3cfafd9
font_01_sfnt_off00011030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11030 10916 bytes
SHA-256: f16dfec98379ee4d545771c5f3dbd63358849737105920de50a49850667f0fd2

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