Malicious PDF — malware analysis report

Static analysis result for SHA-256 b595083f77bd9a50…

MALICIOUS

PDF

70.4 KB Created: 2021-09-02 08:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 161c20f000bc683aba6d390a66dd89d7 SHA-1: 55bab4c00fc857ca47430613c929d77c4716093b SHA-256: b595083f77bd9a50fce8b2eb2b3a84f7528eb2676083b8d02e4aeacd3cbb4b23
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

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://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/678c18e9c03a7708a1f0838e94fe8bbb/18542236478.pdf In PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/temixemiwedutuwoxip.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/00ub5mvsauu7luk648loflgqts/lebadeb.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/13362203545.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/62254742591.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/zugotekewixizugasadum.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/lozobuzujon.pdfIn PDF document text
    • http://heizler.hu/files/file/92184504619.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/7jqc6f82r5n0t0c5lefcgd2mm0/1821718796.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/85422637186.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/26091912958.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a132eb0add9---97913016479.pdfIn PDF document text
    • http://carszana.com/image/upload/File/99223602715.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/s5ldmj8er9gp0cuftumfpvcdck/pofovijuzaxixegi.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074c92627b7e---44039143148.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ca36eb84a---sogivi.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/mu0s1e7uudv8rau2fh3j3mkr1i/bogaw.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/40431487554.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/tomovexibetemigujirabazi.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/a67bfb7acdc50d94d32121e2f67dc936/zenux.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0ohobc9bq0c3e2bf864fap8lnu/24444816404.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/99394487674.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739eba65533---galololowolunafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=asa+meaning+in+mathPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 10272 bytes
SHA-256: af7f517d014dc49082375057436542df1183fca1afee526992073fdc5a705f8d

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