Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff50060464498579…

MALICIOUS

PDF

160.1 KB Created: 2021-06-27 20:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bb6eb9c5f7fe45b1c95ede6dad6d95e SHA-1: 4bfcadb3c4d8b1d117627d2c264287f1e33db106 SHA-256: ff5006046449857996dcdf7c09831b377837b1a46e789f8d615e35656c12b248
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to PDFs hosted on compromised WordPress sites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/9d0fe2edf50864a490d7a0803ee1296b/25674312030.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14f30c8db---fojog.pdf
    • https://implant-drill.com/userfiles/file/lubetumuguxavos.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/mt8cdd60l409drvujirdre3p35/susuwurifumagux.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/niq2531o9ml3rit1sf6tqa3oi7/degogepoverozafakojafu.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a448edb612f---19695023350.pdf
    • http://resetimpianti.it/reset/public/file/83452596510.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078b18b8dd25---gapejunojadefivulef.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a145cd19c1a---dodenanidotiwis.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b976c61c1---wuzabegekawarelalonu.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/iu6k2vtccjoemhfi112qs1bf7o/19798193313.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a908b08b68c---tedujunigojovasenewur.pdf
    • http://rghsalumni.com/clients/82979/File/tetafopewajabenip.pdf
    • http://www.clc-engineering.com/siteuploads/editorimg/file/depatarumakapodokifidawi.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd01750348---91200202517.pdf
    • http://airfa.it/userfiles/file/zasemi.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc82d2a073---80643159104.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b524693091---jipikutavez.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608826db23493---nebunijobene.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077846de3f9b---tejes.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccbe4bf10f---kudere.pdf
    • http://55pluscommunityspecialist.com/userfiles/files/26762717107.pdf
    • http://hatowo.com/app/webroot/uploads/files/87677746124.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=dialect+in+linguistics
    • 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_off00020f20.bin
ac14dcd19e718f44f473f081cc01149672505e7b0fbf084d78916a0d46355c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20F20 10284 bytes
font_01_sfnt_off00022667.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22667 16792 bytes
font_02_sfnt_off00023e79.bin
d33fe19bd4a6b269e2de8a325f3f101bd8128c7ae51e4e8f0f4f8e5bbab9d08e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E79 19588 bytes

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