Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabaf283cc0afe0f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-23 22:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6d3ec4f9ad6ab81d2b5dd2234b0e305 SHA-1: 467e67f257ca6fa8c1c3eb635c7494236bbd12ba SHA-256: fabaf283cc0afe0f9778dfae24e4c7f0391a08a58b91c4e0276da6dd6b48c56b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for malicious PDFs. It also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of embedded JavaScript and the link farm structure strongly suggest an attempt to redirect users to malicious sites for phishing or malware delivery, aligning with the ClamAV detection of Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=hacked+apk+apps PDF link annotation
    • https://elemental-ia.com/userfiles/file/pawemisizagobo.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109081530446447.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/83684956051.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/noferenobalugapugel.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16134337a0264d---geloxafesa.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/panolosozara.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/moxebavena.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/16688755025.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/toxuvajava.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/fujuzamez.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/gusaxojapadirujokof.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16144563373a1b---35481163860.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/69253961247.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/30816103045.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/3667217693.pdfIn PDF document text
    • http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/vixotidorob.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/xaselorarozutopokuwived.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3402438014.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/watuduvumotobene.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/31956833216.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/49027061501.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109170720198747.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/noripi.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/skg6koj9kkjmaiegjbk608kacm/zikarawebaxu.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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 10032 bytes
SHA-256: b88638dbc8443890727326e44e898862fbd660477164ecba58bfe5826b560cd6
font_02_sfnt_off0001185a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 17408 bytes
SHA-256: f49b4d93ea9c9ece181e8ddf19400cd4ac03942ebc674e87b4d29a2c9619762a