Malicious PDF — malware analysis report

Static analysis result for SHA-256 7454f1e0273ba220…

MALICIOUS

PDF

82.5 KB Created: 2021-07-02 19:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10cb3586021a12f3dc058756f1245912 SHA-1: b4ff746a688a5c11ef7568e73a7e464ea4c22e41 SHA-256: 7454f1e0273ba220659bacda762f89a3c843ecef5263966dbc88f55592ad27a5
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also contains numerous external URIs pointing to potentially compromised websites and IP addresses, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/5n2vsc0o58l1ig613ssglq2h95/17217331767.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941d7883cde---62779359924.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21bc86bd86---87717664248.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/950c1972b15a61db2cdadbf828bdf791/94082742028.pdf
    • https://yepsell.com/userfiles/files/wilebeveperudabojelolu.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/6f93ff987b6f07f774a4b1379b3706ef/wigosukakaj.pdf
    • https://vijyaiprismcrm.com/userfiles/files/pawas.pdf
    • https://alarouba.com/ckfinder/userfiles/files/mazidodagonojopumifufi.pdf
    • http://www.biotanika.pl/upload/file/zavovakolokarafu.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb58b91bf72---94014093000.pdf
    • http://ikuma-car.com/js/upload/files/lurovuloz.pdf
    • http://hubbardfamilycircle.com/clients/62940/File/53119804215.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894a9f113b1---zogurasi.pdf
    • http://luckdidea.com/ckfinder/images_store/files/gorex.pdf
    • https://turkuazhost.com/calisma2/files/uploads/37201612107.pdf
    • http://zovsh.com/Uploadfiles/files/16948144518.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/9953d89e33a902ffd8e267dc4de5326f/xebovasexekalesovewi.pdf
    • https://zemiigori.com/uploads/file/77130937629.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/246978662c1f735bc2b664850253bde6/25557463077.pdf
    • https://aduanaldelvalle.com/userfiles/file/17992729332.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/fdaf8e16ddba92776bed863f75f66972/11398205092.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=10+nm+to+m
    • 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_off0000e3c0.bin
6b1663ac42f5727024574c2ec09651260fdad0afb0b0b9ddb71c01d0d0af3d25
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 17192 bytes
font_01_sfnt_off0001111a.bin
0b1cf57ac02f7f57b5e11d0bd21239160423aeec5c8464ccd68592e91f58d42b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1111A 9648 bytes
font_02_sfnt_off000125f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F3 16792 bytes