Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae375c608aa13702…

MALICIOUS

PDF

83.3 KB Created: 2021-08-19 02:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bdec3fa3d540c248c642c52d52af3996 SHA-1: 75e3244f74af3a1a5cda1142f69e54c061d3bbc9 SHA-256: ae375c608aa137028db7b33dbbc71b7e1efb6675b6fb95cf7e90ed3c51517caa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/16365835654.pdf In PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acda3734c4---94062425788.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/vimiximuwoledusumuki.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/92869729203.pdfIn PDF document text
    • http://esistore.be/userfiles/file/35931239829.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e26d1a8d1---famom.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/96332241069.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/35576492316.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/88108384799.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/jeruvojolulipasogevoreda.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/mst4hh4o99me0lulscfnlcs5gq/51083852200.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a3d485424---41094703927.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2329c8dd1a8cf8bcd9c900b92c76eaa4/kirozivoxenazavevafuj.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/totape.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/i95soku2jtp7c8om8m44kidq32/jivisozedaxuwelu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4209d7e1---55282157304.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/nasusilelupegobu.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/fozajudugos.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ftee8ehpu4d2gc6i46ub1kseki/19241093898.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/bukuzujunef.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a57b86d0---nibuzarozotetu.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/fotojedekurepometove.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/22993486563.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/80476207182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+are+pisces+negative+personality+traitsPDF 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_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 10828 bytes
SHA-256: 9457259552da78607a20058d0531394b0f1a5c396742f94b92041481cb5d32a2
font_01_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 16876 bytes
SHA-256: a6258e1e0af0ddfacddbdf6c76d9162b1ffff4a3358ca59b60199f1bea1b911c
font_02_sfnt_off00012757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12757 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.