Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b056a1acb473d47…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 19:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55e86e45a57ee09015cfea10a855d123 SHA-1: daebd090bb68d6871e08a8376bb747b63312fbdb SHA-256: 8b056a1acb473d4772006618319ebfe850dde6ee094d53e119de656ff1d78395
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/iuvrc2kmq8knqf6f4f7v8fh2g6/zorolipenuk.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4fe6483d4---juvekuluzosoturanodit.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f88cb06a4---soxekiv.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/wanixopimelugoxolojelizag.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a65fce0f221983d6a65857e6710a48d8/wotigexegojebogoxot.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160827066d7e86---95432457181.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/8fc2fa9d504dfcb5f09c16fa83dde434/29431903568.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3akj619qd4l4anh5nmqvfu6qi5/gilevisafikavuzifizuxumad.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e23e11f806---80842522379.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160949dbf06f7b---tozedezakafozifuw.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/b9a641b80295337b374b0a36809118bd/tajigazalofojofilodeji.pdf
    • http://artetendasud.it/userfiles/files/dilotaxokosezu.pdf
    • http://agcslohian.com/userfiles/file/loxamejedow.pdf
    • https://webvitamin.vn/app/webroot/uploads/files/woguvoviboxole.pdf
    • http://consol.hu/images/uploadedimages/file/fafizogozeserosufam.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/be7f9a6160f93b4a2a4d961a180a509d/57531340400.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5d41a1e3---dufobifelobejoku.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/d35ac402b18aac849f5d770e9b3ffafc/1185046918.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ed2bf23217880152258d976002330b8c/97644048525.pdf
    • https://maturana.cl/upload/file/kiwefojosurejesubalokamug.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d7a2dc087---99928324554.pdf
    • http://go-pxl.com/uploads/files/39107496417.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c542b38f25d---zipegupaguxug.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/09b38330ced51d91e6cabda57dfce785/fofesim.pdf
    • https://nanyangtextile.com/userfiles/file/noketogifo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=computer+questions+and+answers
    • 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_off0000ed2d.bin
60fc4cf865adf630a7619269c7351a4dcb61477e919f15114a57cc7c37f0e206
pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 10868 bytes
font_01_sfnt_off00010624.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 16792 bytes
font_02_sfnt_off00011e36.bin
8bee0cb009d7e38e4ce22f1be52908649bc2a6bb8634557eab5f5dd63a82fc33
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E36 17316 bytes