Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29082d3a73a33f4…

MALICIOUS

PDF

77.7 KB Created: 2021-08-16 11:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 57adf8879478e063bdcaf272122f5b6d SHA-1: 7e6861e11dc0df9445e434e52a900b1f288e71ab SHA-256: e29082d3a73a33f4b23585984bef7ea0c290b8eb3f2a4076bdafe88cf8af7c0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7773

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 http://bjsixiang.com/jingkelun/userfiles/files/20210723043127.pdf In PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4751fc11fe---dokutonulavekuziwir.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3831a4600---47793040865.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/37296294607.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d69e8bd923---42401863371.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/nivedodaxu.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/pipofafogoreri.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/bafelole.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/t0fto7gcpru3d8se81n5a736g2/juminotariguwabil.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/gododo.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/89221235882.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096059384053---81367278828.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b63a788d33f---59327904540.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/vemusarubarulojedigu.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de242f7bb5b---migazuzasifirurosabepej.pdfIn PDF document text
    • http://ruihuitax.com/files/file/42704009818.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16109fc5509dbc---99161288142.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/9fa17a70a7fcfe02d486eab2ddd8e7c4/tedanovikuposewoxasega.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/rp3t1earftttc1564dqtjebkfj/82428943984.pdfIn PDF document text
    • http://btfa.tw/upload/files/60686935281.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160726747e383b---8334201627.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/76571787344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=bncc+lingua+inglesa+ensino+fundamental+1+pdfPDF 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_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 11068 bytes
SHA-256: 6cf4459b66da359e5b1851c06574935732d192b8f2dcf6ba0cd035aae3970f7b
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 18724 bytes
SHA-256: 8500c30c8d310c53a8b635563a92f836f2015f6ac60da561e8528071f2f9adb4

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