Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c9f8c028dcd2bd…

MALICIOUS

PDF

280.0 KB Created: 2021-07-03 20:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a061f4ad61368d7403a12f282baa9240 SHA-1: 887293679465ec50ab5649e5218f0c9830cbb20a SHA-256: 24c9f8c028dcd2bd6ce8119dafb1d30caeb33e8ecd06c85d8ae0a544d9c80d8c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of numerous external links and the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristic indicate the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7883

Heuristics 5

  • 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.
  • 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://fiscalonline.eu/app/webroot/files/userfiles/files/mewoxu.pdf
    • http://murphysbeads.com/clients/54316/File/jopevu.pdf
    • https://aimara-bg.com/userfiles/file/jojis.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a101a090a281ccdac97e8218562e2afd/80113195254.pdf
    • http://gelikonline.ru/content/Files/sitozunajel.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/g188f27lfirvj1hv507nrd1gv0/kifebosaniju.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fd811bae872a9e4b98be8d28955f8809/12634124078.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adcfffaf78e---53188528203.pdf
    • http://altinay-law.com/images/file/gusepitomeputexuxegal.pdf
    • http://seventyfirstclassof69.com/clients/60772/File/nijapofipe.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/t8osqunkcbuv149ftbhiq1kbk1/94082039051.pdf
    • https://soechi.id/userfiles/file/dafugedat.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/3d2lgm0mvdgeoaeo0eb5tkmhun/23684150297.pdf
    • http://cnmrobotics.com/files/files/badosevu.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d171ce1101---5250144249.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/35834608242.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/lvsqdf8fckfsc112nr0hcr1sv0/tatavagoxakenuwobere.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160acad61770e6---sugojo.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16082497c27e36---68278128193.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf07b9d7b5---6172385760.pdf
    • https://belloverde.net/emailer/file/25085369879.pdf
    • http://buergerforum-tirol.at/file/86324109572.pdf
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/13910327527.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/a4q0taskdlatobv9aca5lgf623/liwefofuwibevomupewekub.pdf
    • http://altelaw.com/uploads/image/file/94775681797.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/k7jde8qrj2qlkj8c6jasb6lfg6/76890039935.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccf1e661b8---92186430670.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=rt+40+aggregate
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0002f223.bin
7d3b7f6911e3392218e228dbb3cbb2c809e968add9eb11d6f75d493d54044e8d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F223 27424 bytes
font_00_sfnt_off0002da12.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA12 16792 bytes
font_02_sfnt_off00032851.bin
dcd069abc3c3a606e3233b552a316952a19448da8259514de0f8ff30a58cd753
pdf-font-stream PDF embedded font (sfnt) at offset 0x32851 48360 bytes
font_03_sfnt_off00039cdb.bin
1bb6c8d2ef56e72719ee3fc40d047ca6a93797d21e1ac22dd68e2dbc818d18de
pdf-font-stream PDF embedded font (sfnt) at offset 0x39CDB 10000 bytes
font_04_sfnt_off0003b32e.bin
82e9cc92bbbba4f75eb7718ae4869b11cf630cab86f81e7aa08d75fad082f268
pdf-font-stream PDF embedded font (sfnt) at offset 0x3B32E 59044 bytes