Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d6ddd98bb077e7…

MALICIOUS

PDF

85.9 KB Created: 2021-07-18 12:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bc6a67820e91ce34d7dcbf02218fde6c SHA-1: b9786514f47facc5d46b67eafd1185bba5b247e1 SHA-256: 82d6ddd98bb077e72a976a9ae1a582e5d913f25a4e8f6e7907639fd7aeb58806
204 Risk Score

Malware Insights

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

The sample is a PDF document that contains embedded JavaScript, which is often used to download and execute further malicious content. Heuristics indicate it's a link farm pointing to compromised CMS uploads and a remote-support tool lure, suggesting a phishing or social engineering attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094816ba9470---65435491538.pdf In PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/vabajifuviwalefa.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084048dadb8c---50105839543.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/32267894944.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077fd49db211---vonewenomiluwatanubod.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/84413552587.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/41213432402.pdfIn PDF document text
    • http://sns.hu/_user/file/zomisawagevawukapajipog.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/zupaz.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/38daf9f9d801595714ce75e5d579b6c3/30637349172.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/dekujurugagitodopopo.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7db6bff90f79997f151eddd91cd2cde0/6984698562.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/183be8019fba0cd5937af57ad6b7ef66/3526026552.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/furenane.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a36aa8912ad---16399729537.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/29178123781.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e80556b39eb---lanowelefo.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/69308465671.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/9108574016ed542bf073ca3f2cfcdbad/getubapesito.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/de27dd954107a57a04ff1506c94e4564/62543114204.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/33196835108.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xulanesusuz.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76f3400e4---pilimiredalinatujavamoxo.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/wazepikur.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090f602358f8---gaxepajusesinasegazeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=acknowledgement+for+it+projectPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10336 10920 bytes
SHA-256: 2459c9f40f0bb88a706f96fbdc71a7bd16b8fc4898e938db41ba498112156fb0
font_02_sfnt_off00011c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 17476 bytes
SHA-256: 8d701d9a3d34f9ac29c0dd2eb2145b01d6c24a0bbba16014768eefa2c413a76d

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