Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a47fd13523fc682…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 20:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8adb4659306a00263eb935781fa94dc6 SHA-1: e0dd032f5610f7805f0879f18d24ea97d16165c1 SHA-256: 2a47fd13523fc682708d472b8160e0f530d8113777e6908beffee75a8c6b29b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. The file's structure as a link farm on potentially disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bona-agra.pl/Upload/file/temezinetatirotar.pdf In PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/m7sndnssh5l1hl7nhsfikploj6/30787553471.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21688535128.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/65998688102.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98366085319.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085ea2927e8f---gazerejupoputalaziwanujat.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/tenavadelosatirabonigoso.pdfIn PDF document text
    • http://ligneus.hu/upload/file/tevoxaf.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/28911707530.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/23782980297.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160c068b073489---67279185891.pdfIn PDF document text
    • https://harom.ro/files/file/48052575784.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e81efc91b23---zepuruka.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/67383675161.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/dedopimobizusexo.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/22410771596.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/17754104467.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c05deaddf6a---sowekudubupakezulipaxeze.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/faforemijabax.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3894ab7b7---29533209279.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/3f6f32c451679eb66ba07e3c6029577c/92930882974.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/70400194140.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764bf5e1b8c---9027934459.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/24514611605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+spatial+aka+orchestraPDF 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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 10420 bytes
SHA-256: 1e4b219902dfd841012e5ed9a89d46e00445cbd087abf3a13f320691ef003b05
font_01_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 18500 bytes
SHA-256: 9b674198664cc2374185cbd33d7d8fc64aed3813bc9dc61218a14292c027a3b8
font_02_sfnt_off00012562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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