Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd090d08b8a2d71…

MALICIOUS

PDF

76.9 KB Created: 2021-09-15 12:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 69eb6aa0697c1428d2732aaf590be5bb SHA-1: ee1977c88109b35d640666e7d94b42e9163747dc SHA-256: 9fd090d08b8a2d71f46ae79cc6dcc7d7c886932f582c7928c2f62560951f1285
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external links and the ClamAV detection strongly suggest a malicious intent to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4417

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
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://crysiq.ru/uplcv?utm_term=the+messenger+lois+lowry+pdf PDF link annotation
    • https://bodymason.com/user_uploads/files/6526634314.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/lavojepaxefosixi.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/zipopititagesam.pdfIn PDF document text
    • http://krishikhabar.net/assets/ckfinder/core/connector/php/uploads/files/xusuwomojomudimol.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/n6eotqacf9rmtlhidk8kf4qjh8/xojimi.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/92445429254.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/sasasolufir.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304f9731c46---7475079647.pdfIn PDF document text
    • https://aashianarealty.com/file/52595223970.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/77198447586.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210911_004255.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d1b803379---fesijukisazi.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/35409688071.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/nogiv.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131fd290e687---65805656403.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/be0826212a62516a6c24f87efbf6f999/guriworixadutaz.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4133928295.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/napodefizobolo.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/40880963775.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8e396a7f---81600209961.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/novunavoperinevefab.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/28152485924.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/8779260992.pdfIn PDF document text
    • https://bdata.vn/upload/files/32781089674.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/bitunasubefabufigowu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DC 10848 bytes
SHA-256: bc22bed7ca5a475bfcc0033d554eb4300fcdf60d67dda5988dc981cacef8eaff
font_01_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 17592 bytes
SHA-256: ade7e841681d7b226dd606e6731406f724104b63c691a193b58a8b7d2d393705