Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbbb2e61672e2a1…

MALICIOUS

PDF

79.0 KB Created: 2021-07-24 13:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7551cfbc499a4f940047b2355ac4653f SHA-1: 5f7241d62a85b1dff3547794f71c9e4e63eb0ada SHA-256: 1fbbb2e61672e2a1dff19250b23c9a0eb3922ad5aa1943f5e6c7c5e1183251d6
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8558

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 http://aliceinformaticasrl.com/user/pages/50360569224.pdf In PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084e11d87c2a---41896261082.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/4745144601.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/gepagesojegoxijumili.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/7584ce5bc05b13953e3f594876687652/weguwiguzajasi.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/52536462427.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/retokebeworenav.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/odp6m6s9q55rciuqgtd3kd1r4k/54481371126.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/nusok.pdfIn PDF document text
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/tesivenixewugukelufebuw.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210714080356.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f56f1be821c.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/6cc616c364a46f29b3acb3a601503164/biletoforurulesejejubavek.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/33r8sds0npq4ud079mgn37egp9/71658948972.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1247c488da---vifebolugadalubiti.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/mazanape.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/56108180637.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1e5f524eb---14254280703.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/gutifumapemov.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/7128301ae28cbfa4fc685da62939de30/33535733287.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc1420584b---96417214178.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/zopagol.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/jgucgcnegmj7dghci641spqe3m/lesimagewotujira.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ac70e354ffab73333757aaa8ed91e979/89917000509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=exercicios+sobre+mitose+e+meiose+com+gabarito+8+ano+docPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 18800 bytes
SHA-256: 3becf452c1c293f4199eb123d586a207b593c53cca5b48e8b2f6785d99a5cb91