Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af47e88b471f2fd…

MALICIOUS

PDF

73.3 KB Created: 2021-09-06 14:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 45a7f99d63f9f7839f7f818fd907260a SHA-1: 72df22f44c07144a422f874e774c63403619d7fa SHA-256: 2af47e88b471f2fd3090338a99ae493ec6c4312ee4f75dc7f09168a397e363ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised CMS uploads or are part of link farms on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9757

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
  • 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 http://turinhotelcompany.com/userfiles/files/titosesifanafabuzo.pdf In PDF document text
    • http://mywymc.com/userfiles/file/95081898603.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/lelejolemowa.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c0b6acb43---vekiduxu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/538700ea5ea9540ad497afe592f4205a/72509440742.pdfIn PDF document text
    • https://xistenze.com/files/files/84449799732.pdfIn PDF document text
    • http://anpo.vn/upload/files/53965736807.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/tibasoxevapuwufurimafowe.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c79957d2893---lijowezozofolibudes.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d4afb06e1---8490147807.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/53881225045.pdfIn PDF document text
    • https://kuepancong.com/contents//files/99173153066.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/26570969724.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/50157936407.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f41d0c6c3be---66914085590.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/ribozejimuxufezixise.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210601140810392561hi3w0h.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/iod5qcoajmpji7nakg07glt1ep/79578665663.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e35d1d1f8b---gulimez.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a6beb04f709---jafowunugugo.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/47745380362.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/de76ac055b29db839afd1e0f6532df28/78839715597.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/b9c2add63a4c9a063316d8d67327064e/jaritidabirumoderofavu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/c6a19679f9bbc7a20401c5a4582c99a9/61306363161.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16080d1bf59c07---lajotuwaxukijiladoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=rainbow+english+book+for+class+5+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 11296 bytes
SHA-256: 902e742d033a5f41e24892d8c05ea9cd4d721cda9c384f8c5318bd787ea8c174
font_01_sfnt_off0000ce3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3B 1936 bytes
SHA-256: 9aeb06937c81a5c56cf99af8deab830259c8e7bb488e779e8e638c33337cf583
font_02_sfnt_off0000d731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD731 15500 bytes
SHA-256: 93b9fa35eeb3f8d3553d06f70fa83296a013d934ad7a57cbeb47b018978fe7d2
font_03_sfnt_off0000ff0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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