Malicious PDF — malware analysis report

Static analysis result for SHA-256 703874f58644b9a6…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 21:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 90573f4547bf75309951ca955c95d489 SHA-1: cfb345efb98787c7b13a3076b4081b7790d8af15 SHA-256: 703874f58644b9a6c3cbfa3bad82e865f897b39e85e5342599ed21a45a592644
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains embedded JavaScript and multiple links to compromised websites, indicating an attempt to deliver malware. The presence of a visual download button further supports a phishing or social engineering attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/29c56ac619650e83168aff354b0df46b/tekikowegav.pdf In PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1c946d256---rudalozuvowe.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/xafodubuwigoge.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/37296930960.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/dijijizasukuxaf.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2b90ffa18bc7e8188c423f9b2dd97aff/25643807012.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/mosavuxijasobinepu.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/8279260576.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/lilepefap.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/kilotifafawirobaginej.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/daniwevonapipefe.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4bd033df9021ea1d311eed5322d7b559/72084525534.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081026b638c7---47201578508.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913f8066f02---69505160671.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba49f68bd9c---85661162878.pdfIn PDF document text
    • http://agrion.org/upload/fichier/rilosekosaxowevezovulilar.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c67d72ccef9---telinemipagukamogejaro.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd0b25741e---rurapamivugedetad.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/b73dbfcd49379c002c6276f2954af82c/viritazeg.pdfIn PDF document text
    • http://lapempi.nl/ckfinder/userfiles/files/12652765764.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bce1fadbafa---56784806359.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/1056b27da54b95f3ece58ad8d4eaace6/nafojatekitekub.pdfIn PDF document text
    • https://etadelloro.it/images/file/zemuwobe.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608743cf2aaa2---rotux.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b9b3ea9a3f9a07983f2125ce6a3c01ea/ropinabakimufisoguk.pdfIn PDF document text
    • https://anfauglir.com/images/file/87552713568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=linear+algebra+schaum+series+3rd+edition+pdf+free+downloadPDF 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_off0000df4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF765 11520 bytes
SHA-256: 726b3937854fb588088ba50c64e85496bdebf60718eb6d739714d37d170c0392
font_02_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 19576 bytes
SHA-256: ae74a42415421bf00f95e0870d2217b32d49d1d19c84b6e6319c9546dd819a1f