Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dc734dd891f77a…

MALICIOUS

PDF

288.0 KB Created: 2021-06-25 08:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 730c1541b58791ff47dbc295f6a46528 SHA-1: 3555229a31820c04c2bf1abc38de32601327841d SHA-256: 97dc734dd891f77a29f93e3d78640494b41fe30e6eedb1108d961bb37bd7daa8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous links to compromised WordPress upload directories, suggesting it is part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains text related to a free download lure, further supporting a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

Heuristics 4

  • 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.
  • 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://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d013971ea9---12765323295.pdf In PDF document text
    • http://beergolfers.com/blog/images/file/9998763287.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/93188760037.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2996ada7d---gapajojukakutibuvasuvi.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/8rc08uu94tfcuitn3a48bhdns5/70483680828.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa9b2f306b---pifapekodemigoseno.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/86842422254.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/47496890925.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8850d7086583a8faf325209f488297c4/zuwas.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c852e208dbc---58346845249.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/miwenozujetunanex.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/67778874515.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160980918938d6---64002064661.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/d2c0k3iongqcku26o7linghlp3/kivemiboxedinomet.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/mowatopolamujuvofi.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a511384fb1cf9f87579d39ca694afa17/kiwixoximavuvexaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=yiruma+river+flows+in+you+mp3+free+downloadPDF link annotation
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C375 6588 bytes
SHA-256: 24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
font_01_sfnt_off0003d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D3BF 34956 bytes
SHA-256: 6cf12b2c6b9f5ef25fde2de6449a3071c22be3927b2e0fa53807e0d5a09c3c1c
font_02_sfnt_off00043b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43B73 5568 bytes
SHA-256: 999007fc0398d19469a81822d304ef242089403e6b8925aff2c314180b520b1c
font_03_sfnt_off00044e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E60 3972 bytes
SHA-256: d330dd0b90fdfab09b4fdc25f158e1c32d9b159417416d8f87c246efdda859bb

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