Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ccac6a92d56285…

MALICIOUS

PDF

84.2 KB Created: 2021-08-18 22:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c78b8ed718206f4b2d12640aecf10d77 SHA-1: 2187640d4c94f3eb83643d4ce0f6298b6691fccf SHA-256: 45ccac6a92d56285259e606ee22ac009a3eb92f09ab1117c669814d54ff11116
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of a link farm pointing to compromised CMS upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to distributing further malware or redirecting users to phishing pages. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://digireg.gr/upload/41126860693.pdf
    • https://aduanaldelvalle.com/userfiles/file/34040626934.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c7346f02657---51720550847.pdf
    • http://eotp.info/sites/default/files/fck/file/24030759654.pdf
    • http://langeline.com/ckeditor/upload/files/kutimajefixefopudeleder.pdf
    • http://alacarte-design.de/userfiles/file/5672728870.pdf
    • http://sns.hu/_user/file/62673711207.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0e21e32e8786dbe59452a059e6404a13/bovorojepasafetezefuta.pdf
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/watujazakajap.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/8ef05d3lr0a1qtrttiido06tpr/50115161125.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a825949ebc1af826bd1c065d7a6402b7/robisiwugimeje.pdf
    • https://egf.tw/test2/images/file/nedum.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097c75366a4a---wedojogozonoturadiw.pdf
    • http://servis-hradec.cz/files/file/pobalesujizukazagov.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/92228cb86e7ada5de32e5722428b63fd/duzijawodomimukutupupabu.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/20d773750e3b23daf53df637a482b592/riteru.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ff105fc5f---retejomivoviwojuxavenigo.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/90682247840.pdf
    • http://anvlaw.com/userfiles/file/25085287712.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/1004439112.pdf
    • http://forter.vn/hinhanh/file/51083124895.pdf
    • https://www.alapan.org/fckimages/file/82555809447.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/37a9928158b9eb25b5a570561694c252/26806082273.pdf
    • http://www.allatpatikapecs.hu/images/file/43186297320.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/obohtav6gugl48epq0tljgffi2/78847059755.pdf
    • http://indigobaby.eu/upload/files/41429468380.pdf
    • https://pakistanchristiancongress.org/userfiles/file/tagibej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ccna+200-301+official+cert+guide+volume+1+%26+2+by+wendell+odom
    • 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_off0000e22a.bin
749d36b524942458a3ff2d514e7b07e28cb44da8263cdff0b55b4b93dd84e44b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 17604 bytes
font_01_sfnt_off00010faa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAA 16792 bytes
font_02_sfnt_off000127c1.bin
d6a70f163b30a9eeb3e662f7f87ece02a43ad38d9fc0b13a8a39e6d257b275bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x127C1 11348 bytes