Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3bb53287b31fdb…

MALICIOUS

PDF

101.2 KB Created: 2021-07-03 10:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cf518452cf9c87cc2dc605735a7fa46c SHA-1: 1f4ef3e42dde1b56e7c4727451333b121d64a82e SHA-256: 3a3bb53287b31fdb277eb8aeeab0b247997192494f8ec67da1380cdb904825be
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://garglob.ru/uplcv?utm_term=contribute+meaning+in+english PDF link annotation
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bca741ea636---550191827.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95a5c56de6---setidobe.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9fabe4002---26524784081.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a2fc7eb9b---roduxutepawezazas.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/volovesuzomulixukuwesowu.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210616_8E44C082AF72E33B.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3571e21525---dulenaturejesujidumuba.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e051dbb02e---61723758552.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607568de58676---revewivaxidimuzo.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d523035856600a42cc505f3cc49441f1/68758932326.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81945608358.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc332a9b2---34890984946.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/amueunu4skh5s7s1u0ffe6l7na/kinodipupugesedo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/18557124992.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16071b80c8fcf4---98820936359.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5e0ac89ff2ed932a952a8cbf99bab05a/xerafujomuxejimipuduz.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160879eb04127e---gigazimaxuxomosaxak.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/c7555ddaee581ebf034c738600767b10/ximomavel.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/sivirusifu.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d4725c394---mateba.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/pilasonomu.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/937a9cb8bf86a3e0ccc077e5dc904047/todemifo.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/junmpjuh5lev5ql7c87pmnba37/wipugapemabimovukofu.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/93961b4d0a39365435391daf222bb7ea/nirovedirodazizetan.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/v9kgi0da2nonaq2dunt6u5ruk0/kuruwagosira.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f3e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF3E7 27876 bytes
SHA-256: e8f6f8cd822614f97fbcb9c2c46c7b4ef901aa744154b21fc078da316bb0b004
font_01_sfnt_off000125bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 10824 bytes
SHA-256: 4a2b06de7dfc8817dfbc50ffec0db6b235bd4fac44c4caf3dae1407b6b84d7a7
font_02_sfnt_off00013e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E86 18352 bytes
SHA-256: 4d2bf2e1f628a23e56dbc2e79f356bdba0c6e5acecd89a81a1b0e0caec3c6829
font_03_sfnt_off00016f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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