Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17fc5264a659a52…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 10:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5c3830a5d9b1817d7680de1a914b723a SHA-1: aec33ff9b43943c3287cc4a1b53787cc1251729e SHA-256: f17fc5264a659a528c30f9e2ab17fb2047dd2784a6f756be312bc99545dc8e62
124 Risk Score

Malware Insights

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

The PDF contains numerous links 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. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3161

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 http://onlineexpert.in/userfiles/file/22810718774.pdf In PDF document text
    • http://atenngo.com/admin/sites/site/documents/7279049457.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/74829774866.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210527_9C1D3CE7E5F97E95.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/dbrelpathdekgmtoilqr09eju3/2381190099.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606e539657b0e---18568375458.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609febfcb7dbb---30869759862.pdfIn PDF document text
    • http://didopack.com/files/40643288799.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/b53b3ee91514f0fd251d208b1502050e/5669872190.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23626e81f83547793febec9c0fcd7e75/99187012988.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/5hbkl3cncu4gf7ojva0njl4sni/14683339139.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/4366tel5t58rhu5jc70rr03s7l/ketusinolapatakenube.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/iqtqt6fssmu9c27m8m34c316l3/80230644268.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/27l7onc081i6qb00uh85008kv7/kononorazasaxise.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/kozajojokojubu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d770a33f7---dazavaduvitona.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/12d251b2537a91a79c948679e8b79ae3/javaguduvajikiraferatimo.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/82569129431.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/mokcnpvb4av13kimvi28lq4t4n/81105028109.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c53414e6832---bogowagudevozaniwixebuma.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/57723759986.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4d2f97f70---92313875405.pdfIn PDF document text
    • http://wajl.net/img/file/2021623142157.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d66d7519156---63120392304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=j+lo+before+plastic+surgeryPDF 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_off00010ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA0 10896 bytes
SHA-256: 3bc8e99d7bec0ab92c1d8b42a0904f847d0ebfa0a4e47e50b6001ed1ce26dd45
font_01_sfnt_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 18508 bytes
SHA-256: 1297ce4f6b3b8bb29b95728f27946b3c212bb7fde3bb2a42fd9b297be804f612
font_02_sfnt_off000158ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1