Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5b3e7ab20683ea…

MALICIOUS

PDF

119.7 KB Created: 2021-08-01 08:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2b1a6b7fa81cf44cd9efff7146561447 SHA-1: f5d9e9c45d1a2f6bd8a6c32950484d646ca16cf3 SHA-256: fb5b3e7ab20683eacac3b7f7c49c3d75f1deaa2fd73be2bd95e5bddfc7788457
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristics suggest it's likely a phishing lure or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607201f2c37be---86528649099.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/jrfar61m2v8be2alllvgqttm65/lugutevolizitopererusav.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/fd9b0885b4945a1cd0856bcbdc5662e6/9983218794.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/wobuwujobijiba.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/20315994241.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742a2f0f08c---27211586146.pdfIn PDF document text
    • http://clingac.es/d/files/20013793869.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f86c34bb2b5---51676806137.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe0f64f51e---1057576352.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/xuwagi.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/68170244432.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/010da25ab0b00f068a4b5ef085f7cda1/66995027154.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/47753159306.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ff933756f---70719955897.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/gegotir.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/punukurelafevus.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/didiwene.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/sujotokigigigowiz.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/76717022909.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2dd63a460f4d6c38b789b206fc916401/78955909056.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/14339727992.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/49eb658e842e98bfbb8106274bec3748/82131690248.pdfIn PDF document text
    • http://blueyee.com/upload/file/270551047596.pdfIn PDF document text
    • https://immobilgold.com/file/40717677550.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/bad39cb7653dc86e7de90d5f506126f7/33674486957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+catalyzes+peptide+bond+formationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00016a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A86 19860 bytes
SHA-256: c98901b705e6b49c2ba2b85aec570a6452232d796076bc8b3c3dbb7079b5143e
font_01_sfnt_off00019e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E85 11192 bytes
SHA-256: 976382977ddc678bdf417a1b4912b8e401c333977b4231f0911b556a3650dd2f
font_02_sfnt_off0001b864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B864 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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