Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd58b1eace452f66…

MALICIOUS

PDF

83.0 KB Created: 2021-09-20 01:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 949d6add1b0c3632a012b67d243c54fa SHA-1: 8aed2a7e99bbe75e7a2e3a3d26c76e89806f30b9 SHA-256: fd58b1eace452f664d7f02575e72356ee2432f9c12eb2d2f752fb5a390f70fe3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://yjeverspeed.com/userfiles/file/19427870202.pdf In PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/80237455904.pdfIn PDF document text
    • https://typeone.com.my/ckfinder/userfiles/files/jupifekowi.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcead0ef01---sosupejat.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614735edcd5ba---potakoz.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/sanevatopirulerirare.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210915_182944.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woziduvix.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/bumapirinukakinorutu.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/78911953068.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8fe542163---2268544119.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/xoginunuxofazem.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/59891303008.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a3de08284aa423c68015eeee834e438a/jetasufibuju.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/vagunarapol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d44f0811a---55308992298.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/6312682051.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1b22e61fd---dakegipiraw.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/jajenuxe.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/62552772301.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/7db26fa2cf0d36a9e7768b3d9f0d43f7/6022606022.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/bogegegureluja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=apk+bleach+vs+naruto+3.3PDF 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_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 10996 bytes
SHA-256: 6685633508014dde6104631dd026d73f88123a2757e3add1d233547fd7e9c550
font_01_sfnt_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 17220 bytes
SHA-256: 20128af4a0aaa527003e37ed809e013af38a1960a68efa8ee34e393375ad443f
font_02_sfnt_off000126a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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