Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe80b089ca904b1…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 17:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08ecfed20224da2e744c09a98b34a63d SHA-1: 2889d92f11339e5c7bf5e25e9c037a97dd6bbd64 SHA-256: bfe80b089ca904b121c38320345cbc41e02b154d6242558fe6779daa0ead9628
196 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. Numerous URLs were extracted, many hosted on disposable domains or compromised CMS uploads, suggesting a phishing or malware distribution infrastructure. While no scripts were directly extracted, the nature of the lure and the presence of multiple external links suggest a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ariogalospspc.lt/userfiles/file/tarez.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161450a68614c8---dodakibolesuza.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/dalebeluki.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/taxugumumukixaxet.pdfIn PDF document text
    • http://abnicum.com/files/file/85393928977.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/90478627885.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/80953013674.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/60304192128.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/duwukanoponewi.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/72433662514.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__61312BF0BF65E.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/2600140473.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109162333259140.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/vikosalotelidovum.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/ravulipafox.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/rupodotetevekirajuzedamu.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/86020176758.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/9e30f5980a2711205ceb1f4a2deef388/basirudofarid.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/tituxunubomewaridejuzu.pdfIn PDF document text
    • http://marupi.de/UserFiles/File/pedarunumifuf.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff0300199c---vixifipozobaso.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/23260515455.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/terewufapipuxow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+enable+app+permissions+on+androidPDF 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_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 10768 bytes
SHA-256: 1fda27373de3773a7de3deacca3161765dccb0487b49b168df52f035b6729f6e
font_01_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 17188 bytes
SHA-256: 51b005774ad4f4f9751c3760ef4dc9367a47001ebeb3ab40dca436607bd7837e
font_02_sfnt_off00011d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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