Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db6c56896791376…

MALICIOUS

PDF

80.0 KB Created: 2021-09-14 05:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5dafc216f7f04ab8dcbb078719fd4f1c SHA-1: 379556d695465a30cadf533c434577b331b597ac SHA-256: 2db6c5689679137638916436d1c9c87af4dd3c0f173ec436d67cee55033ffbae
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132a32bdbc5b---judalozoloxes.pdf
    • http://kokocurry.gm/userfiles/file/86904912828.pdf
    • http://skpizzasubs.com/uploads/files/xesasevepe.pdf
    • http://prodottoitalia.eu/userfiles/files/58191517532.pdf
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/fenivikipojaferaj.pdf
    • http://studio-orlandini.com/userfiles/files/960783942.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135957ab2bbc---vovuzoz.pdf
    • http://kaies.net/upfiles/210907220757536262i2jh78.pdf
    • http://architetturaurbanistica.it/userfiles/files/kijoj.pdf
    • http://mbeautyconcept.com/upload/content_images/file/13522672471.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4200094e7---81007185889.pdf
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/tulivudovatoxu.pdf
    • https://sarvodayasamaj.uk/upload/files/sifavapubapax.pdf
    • http://cabanagarden.hu/editor_up/tawowisaxuwibiku.pdf
    • http://eltprof.ru/userfiles/file/47158158346.pdf
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/fanazonimetunixuvifizalo.pdf
    • http://wwsm-us.com/files/file/fixadidisavinulibijel.pdf
    • http://gmart-express.com/demo/uploadpic/file/75314619054.pdf
    • https://newtop-eg.com/userfiles/file/62981335797.pdf
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/49522680012.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613f31b2bc4b2---benejavuvoj.pdf
    • http://lasfyy.com/uploadfile/file/20210906095957662.pdf
    • http://fra2ange.it/userfiles/files/gezabebuvebimipujepa.pdf
    • https://living-stone.lu/userfiles/files/595878423.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=games+like+pocketown
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/67901532029.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d677.bin
02ce3389a58016a2c114983d65c90f6733a6dcb08d2ff4e736cb504eb1d53ea8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 10652 bytes
font_01_sfnt_off0000eef1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 16792 bytes
font_02_sfnt_off00010703.bin
e8c158332e652f3ef4993f8e12cfac6c30f63593054004a296645fcd5bd85360
pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 16896 bytes