Malicious PDF — malware analysis report

Static analysis result for SHA-256 4167eafa4fbd0c5f…

MALICIOUS

PDF

70.3 KB Created: 2021-07-05 06:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 67a47525ca4b2dc4ea017a1dfe45174a SHA-1: 902a426f49b5ebe26642ddbc5536d50796c42935 SHA-256: 4167eafa4fbd0c5fe64344a409f1c6709d5249c768becc5e3f3c46a6eef13edb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised CMS upload storage, suggesting a phishing or redirection campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/89e1dde8dccd378ea65e174c1f1d0cc0/wilafaduzovinomaguvipowe.pdf In PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/nixowelagak.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0da240e6e1---xogudiwuxinuno.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/nemevowusozuf.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cb7d5696e---mekazara.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/gifozorifutik.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/pemesadipifuligazawanadi.pdfIn PDF document text
    • http://cartopack.com/Images/file/60276970167.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/64725007288.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/11c6f59d34b28ac1d9b679077534650c/96170188015.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76065af99d---33384679922.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/lajogilazuluw.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/550c423bef075481beb6e2a1325af914/37546184757.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/mizuguluxebuvadam.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/parisisesebidigafojivexej.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/3307957406.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082fbfe3aeb2---kizuzu.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/tepejifenit.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608df6fd08c86---bofozetijej.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783603addf0---gekise.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/zugogu.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070fb58aaf71---85933433617.pdfIn PDF document text
    • https://elektrona.cz/files/file/34309266413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=new+baby+filterPDF 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_off0000ce2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 17228 bytes
SHA-256: bba1594e1b7c309e9d977c1801e768502b0d650f847399fe4680b363b404e0dc

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