Malicious PDF — malware analysis report

Static analysis result for SHA-256 b551ccfb87e7a94a…

MALICIOUS

PDF

104.0 KB Created: 2021-09-04 18:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0d6c3c5212dd6660c28c9c023acf3be SHA-1: 26976b9aa2ab2b0503c563c822b31cdbde67ba62 SHA-256: b551ccfb87e7a94a87c6db2f33f46464c997d0489bf0bf2d8ee201ec18372730
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7856

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://huntic.ru/uplcv?utm_term=livros+de+drenagem+linfatica+manual+pdf PDF link annotation
    • http://ks4073.com/file_media/file_image/file/rekubova.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607153e950add---85139834337.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/8168410167.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210809015437.pdfIn PDF document text
    • http://isvpro.com/custom/files/8645095917.pdfIn PDF document text
    • https://kawanmto.com/contents/files/41951549092.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/gjp0bed4qm6i1qn6ro2onf1fqo/66049097671.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/53147966768.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d69643fd8f8d8c459a11412fd69763c4/4411515071.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/55591281068.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/lezebaxigox.pdfIn PDF document text
    • http://fkhd.cz/data/img/79925106818.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/90030366547.pdfIn PDF document text
    • http://pileki.com/imgup/file/bakefomimogovozolusete.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38cbb34d92---sigoxepativima.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/a3d78b9d9328aac04ced6323106d1ac9/39914556850.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/7194d7ebcc161d312fe2b0b6a7211532/lewubasiburevivorimosiva.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/tepizobomati.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/0b6c119921293b116e804804ba12c449/88111152411.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/jupilolevaxonatimoxe.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/e2450d376fa28953b3376e117ea5c6b3/25447026414.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/zetutisozifowavup.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0cb125d826b40c22e3ef4d2248a05a07/14458125549.pdfIn PDF document text
    • http://pk.mo/userfiles/file/kixegidufor.pdfIn PDF document text
    • 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_off00016a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A65 19720 bytes
SHA-256: 436124c54dcdf065c140ddfcfb25b41762f671d7e8e3fd24f9117d064e1899c9

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