Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f98bfb743b0c34…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 03:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0b712391fc3195f5b36b544537c06822 SHA-1: b3c59ec8b48cba55f1f9ce138ca1db101651835a SHA-256: 63f98bfb743b0c340d2b6bf3db588b8e541af2caca148539442219b07a9309fa
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 compromised websites, a common technique for distributing malware or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document's purpose is to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a499ea9e3e2---14113353899.pdf In PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/07bf017b9433f8a0b1b30b864f65254f/9950557768.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/13737098771.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdadd4b8a2---kiporijoxapofudagajurevut.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/9978395781.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/89df254378bba60a93c3dd7abe99bebb/69868395580.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/36b355a88dbda40674488dfa5b81adf6/75890938710.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/62824810674.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/sozexipubu.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/60346540486.pdfIn PDF document text
    • http://cissi.it/userfiles/files/nepixaxe.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609914e6bc1c9---dixefamutikug.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f20b67bd8f---panoparogawogesulune.pdfIn PDF document text
    • http://mariancozma.com/_user/file/zitaduxirika.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/34592809889.pdfIn PDF document text
    • http://polletnv.be/uploads/files/filax.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/3467cc46af8ffc81947e84f2423e4ea8/98893131444.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c91b759d04c---roduluba.pdfIn PDF document text
    • http://portsreunion2021.com/clients/b/b1/b1889431de095b9710a1303a3c619afc/File/tobolajeluxiruxu.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/sezoge.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/nosinijawagajesovigixe.pdfIn PDF document text
    • https://digireg.sk/upload/kubuxiwum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=richest+man+in+the+world+nowPDF 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_off0000e476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 19316 bytes
SHA-256: cf623f6e063237d0117a15e8e4c9c38e4a17db34b3a15e4136367ed179b6e169
font_02_sfnt_off00012fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA7 10764 bytes
SHA-256: fbaaf8dca4a2d826a2b40b86eb68ff097ad492edfe4d77cc9216dd04f0146ecd

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