Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a66be59aee4d6b2…

MALICIOUS

PDF

118.8 KB Created: 2021-08-07 19:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9a4a2abd7db240a5883499985342def0 SHA-1: cfc89151009a3f35daef2bb330c0552eef037dc9 SHA-256: 6a66be59aee4d6b215276e958a25c8c1fbae55be459b852841f91d08d9ec2e8c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d258e53ba---23137197264.pdf, are likely used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608db0d4a348b---32480345943.pdf In PDF document text
    • http://robalton.es/Albums/images/file///3586417988.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087080bed12d---29353792164.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/mokotumuxexabidajanav.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/13ndupnsekbrt85um9j0ll21jn/ruduxa.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d258e53ba---23137197264.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/32365820826.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cef2cc3e2e---zejuwanarevurenitagu.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/19649178447.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/18883348466.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/86444691940.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/cdfaa9fb5b56cc101cb387f048282df6/jezasujefowi.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/fosevakuxirubegutonema.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607765d931ec6---gudosopasagefamukoguva.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/37203253138.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/30767851804.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/fulojitobab.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a7967e473ede1ac6bdf0da7b6d3e8c56/55231701362.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98af8ccc88---narosovizabaliru.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7102923ace428baf18085b2d91785e09/15423655328.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/16536886565.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/13663752625.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/51833089145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+i+write+a+bio+for+myself+on+facebookPDF 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_off00015548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15548 11060 bytes
SHA-256: b726f2ac9db525d741f0d0caf275a3a4fb5fe2376abaab94702e6b574d607939
font_01_sfnt_off00016f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0B 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_02_sfnt_off00018516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18516 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D28 17732 bytes
SHA-256: 658838c0c25cfd8d91c680d9dc2ca9c9a1c314f2fe05ffed0fdc38fe7d02e753

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