Malicious PDF — malware analysis report

Static analysis result for SHA-256 9759072f6f427004…

MALICIOUS

PDF

99.3 KB Created: 2021-07-08 10:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a26def4efaaeca6ef8bbd22af21443cd SHA-1: 1bc13d5ff2e20f7f0ac95260bee279a079bfbbb7 SHA-256: 9759072f6f427004e2dc8e5bb49a9b69205c0d7f5b5c60a4af74d02604993c25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it is designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 https://oniceh.ru/uplcv?utm_term=thrift+stores+near+me+now
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/e2903b5a0c5cec5bcb1571227e129c4a/kupebomezot.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebc9f327ca---tasozavojofu.pdf
    • http://beateromer.com/bilder/file/rodikisake.pdf
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/90313051415.pdf
    • https://amatnieks.com/pictures/image/1047311734.pdf
    • http://uppercanadatwocylinderclub.com/clients/877835/File/87139008054.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/f8fe74dbe7f4e31fb1427b5da66a0ca0/77051200785.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/0cc874b9ef50e8436070ef1a38df48ab/satosowagox.pdf
    • https://zoldlepes.hu/userfiles/file/nininobazevip.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098597a80048---vofaxiduki.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/48qbqc1rbvmuholdc5nafcopol/zavadaxe.pdf
    • https://stalbeckers.nl/userfiles/image/file/kofek.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e896e3d3eb---85272253119.pdf
    • http://onlineticketreview.com/images/file/23691805698.pdf
    • http://doubles301.jp/files/ckeditor/files/vexelegafoni.pdf
    • http://dunajecbiala.pl/upload/File/91570098649.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ckgenq8mip03uoif8gomam7be0/nuroxifukijetetegi.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/0da4186603b2773e25dea79867aa418f/62756354447.pdf
    • http://pr-jam.com/ckfinder/userfiles/files/72495041641.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/lmqits625h7iv6a9pbt6rsvj68/jaboboputopolalo.pdf
    • https://zoldlepes.hu/userfiles/file/68018914940.pdf
    • http://airsoft1.ro/files/file/sojomatemofifa.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a746efe5494---93654463045.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/sen77hjoa4h1f3k6bgiddngfa3/92053735966.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123b3.bin
0119b710186b8ca8133c1e6ba975c074b406fa830a3b3a23b705c7520ba12246
pdf-font-stream PDF embedded font (sfnt) at offset 0x123B3 10480 bytes
font_01_sfnt_off00013b65.bin
fd9043e92c913d8c92163b81c0304f6ce97441f2363dcf49b6bd91d97a26f746
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B65 17044 bytes
font_02_sfnt_off000167ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x167CE 16792 bytes