Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a356ff1e4d4320…

MALICIOUS

PDF

89.5 KB Created: 2021-07-24 13:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6cf1629c39ab25964e51c75cd9d4dd3e SHA-1: db11b0cbc656b122e4e22f8c062e4438cae98cd0 SHA-256: 09a356ff1e4d432039c1405d287d7f91e4f4e202b1b209b22651d6834a7b15a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit user interaction via T1566.001 (Spearphishing Attachment).

Machine Learning

  • Nyx PDF Classifier malicious score 0.6426

Heuristics 5

  • 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
  • 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://anmoul.com/userfiles/file/40701417077.pdf In PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/4cd2367bbd5bcfdd8371fe3423cc9ea7/3343622797.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1727e728---wugisaxi.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/73118598707.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/zujafowabefiwefa.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//dotalezokawini.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/xaparapumofaxanuzomov.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/14197927701.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/repabuxepogoxunomosinex.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/93383495219.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7a77d79fa---87171283922.pdfIn PDF document text
    • https://digireg.gr/upload/susabopi.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/89176223586.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/7950436498.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/ruvebojowetelawoki.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/76066030870.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/07/files/210702151601.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/b863cvpp4bpumel9apsfu8tah0/68729669895.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8232a81a15---3352757076.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4810ebbc7---82276690089.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/rovidaxexobowefat.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/powasegu.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c91089bba---52978482431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=bhairava+movie+songs+in+tamilPDF 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_off00012b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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