Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb2c32ab252d762…

MALICIOUS

PDF

68.0 KB Created: 2021-09-25 16:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c86248d3f65726b6bce3f8939d98c75a SHA-1: d0758118ad01fc50919fb95f4b830dc55987d1ef SHA-256: 0fb2c32ab252d762a947b3888160ae6fa872dd29fba3e53b03a4cd1a03372a84
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, typical for directing users to external URLs. The numerous embedded URLs hosted on disposable domains suggest a link farm used for distributing malicious content or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crysiq.ru/uplcv?utm_term=skyline+emulator+for+android PDF link annotation
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cul4r5pmengg8m6jk7dlek0bg0/piginam.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/50456844296.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/rufezijusana.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/fawot.pdfIn PDF document text
    • https://sharenkon.com/files/21060784546.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/bonipagabasofixeded.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/98191359628.pdfIn PDF document text
    • https://0900107678.com/upload/file/86015970584.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/seperanaf.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/pijanejufako.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dazazivatokorawu.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/tezodalipudopetuf.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/degujinibezimuwojaxigobat.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16149b5a5e648d---rezuwanirigetibares.pdfIn PDF document text
    • http://xn--b1adcbbai1bezln.xn--p1ai/content/File/raxatokuwomuxo.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/3493243444.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/84096197611.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/42599859667.pdfIn PDF document text
    • http://dungcuthietbi.vn/Images_upload/files/durefejelanemumir.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/58091572704.pdfIn PDF document text
    • 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_off0000adc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 10728 bytes
SHA-256: 07465b7aa139ca3afe05acf0f0457387ac2f6b27066b5266b2e79610bf9d5b41
font_02_sfnt_off0000de81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE81 14380 bytes
SHA-256: 58191d2a4b2281ecfb7225ec35a8b51f27a4a0414dc74d5d95c48552ff439445