Malicious PDF — malware analysis report

Static analysis result for SHA-256 960376de0d96b0b9…

MALICIOUS

PDF

104.1 KB Created: 2021-07-30 02:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52e36e69f55e5ef6281c792fa54c3a13 SHA-1: bd44d64494ed9ecc5dcb94e250c5729e058068cc SHA-256: 960376de0d96b0b9d8e88e3c291ea5241aebbb1eea1f727673407b45ad8baa38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9559

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://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7f0eefe6551230527c0224077a2056e5/24280586604.pdf
    • http://absolutelyneon.com/userfiles/file/nujexesodibofevamabebofis.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbce065235e---telapumomifuwedupi.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095dc682f206---rexakalewakawide.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e49e0b6ab07---jividukumebufag.pdf
    • https://dansobentre.net/uploads/file/vekiduvujosikapuradosu.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9ba0cb0ce---wojabekorajazuzi.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/9e398e9e5b1d7e000fb23873e97ef09d/35583811614.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608052d5a47b4---repixoside.pdf
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/gavewodoginafezovigosiras.pdf
    • http://csc020.com/userfiles/file/20210624075711_2kxmbb.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070260e628f2---nizigosupulanaverix.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da468cef48e---92805107962.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/6j17s8648sj6o55jtga34jpog2/3861986816.pdf
    • http://cokhihoaiduc.com/uploads/files/revepawifivub.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/66f55edf32efbff01613c93299272960/xuzaxiwub.pdf
    • https://angelsforwarriors.org/userfiles/files/30585353773.pdf
    • http://kapelski.pl/userfiles/file/pibolojivon.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2b3f9381c9ad1a8963d28f0d26a1718d/taravovulukimebej.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/38117192798.pdf
    • http://abwmarlboropike.com/uploads/files/puralemaselonotonaje.pdf
    • http://greece-ex.com/images/blog//file/vubakabezokebux.pdf
    • https://esz.jp/img/editor/files/gisogotetabafakaxabos.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/c3f7vnhjgrqpi2ismeej1l7ap6/47549634261.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2lp67mjv1k36kgi21o1315qk90/61409105510.pdf
    • https://gulceoyunlar.com/calisma2/files/uploads/nuzivagaruzaw.pdf
    • http://benevolo.it/userfiles/files/buxudesof.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=actividades+adverbios+para+ni%C3%B1os
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115dd.bin
3dd51dd797efaad942b4afa61e64d52a2ff09fb6d5ca688b2595e4cbc14da3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115DD 19800 bytes
font_01_sfnt_off000148b3.bin
6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148B3 16068 bytes
font_02_sfnt_off00015dd4.bin
b03e2079edab518aadca2bcb5c1dde9e8f26d207f708935b57637b36acff2cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD4 10852 bytes
font_03_sfnt_off00017692.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17692 16792 bytes

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