Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad99648dbace3397…

MALICIOUS

PDF

87.7 KB Created: 2021-09-04 13:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1ca14fb4112a3493737da0d5c7c22f1 SHA-1: eb3b5e2d4ab8dbbe286fffced58ebe2444f96d1b SHA-256: ad99648dbace33972ffff2f994bd829d574a2f010ccb4a8394bd4b32c1d2b70d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories. The document body is unreadable binary data, suggesting it's not intended for direct user interaction but rather to host links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4369

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://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/da53f265a97eced41e1f3e231b985f46/gudizej.pdf In PDF document text
    • http://kapelski.pl/userfiles/file/xamasomono.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/penakupevojanurogedo.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/54979007527.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/64412223987.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/zapari.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/1848895023.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202194164772512.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798a90315c1---73806386552.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/772a3f88947f1199dccdf8f3cd8371ab/jikukufixinotuborak.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/vupanelakapigokepaxu.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/sopetewetakupabaxebiw.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/gakixeser.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/xejakemet.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8de0dec7---wefodirepitewisafunugip.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/ratavagexikovopiwidu.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/75410410762.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/60815746273.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/wawudeb.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/buguxadeputivojovepip.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210823061457.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/kabijesixusenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=la+r%C3%A9glementation+prudentielle+des+banques+pdfPDF link annotation
    • 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_off0000fc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7B 11336 bytes
SHA-256: d3c3fc874a63422d369b17600278a83908ef36f3ccad4214f55bd71f3d40d7c0
font_01_sfnt_off00011613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E25 21280 bytes
SHA-256: 939426179078f9473b51255db2a5b5a95ba6288bde38814fd8b8b112c345c645

Open this report in the interactive analyzer, or submit your own file for analysis.