Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba514f522e780d4…

MALICIOUS

PDF

96.7 KB Created: 2021-07-07 06:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f806658bc7f2d214c7c2b7a78bcb6764 SHA-1: c44b189906d22e6d60a373a2ed6b2917302d5eb1 SHA-256: aba514f522e780d4614b25abfd184167f4a26bc48ebe5954f7ac572b7a9394a0
156 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 and disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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 http://woodwork.pl/ubezpiecz/obrazy/file/29233384069.pdf In PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701f4ec68c9---72004760882.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/xepuxogazi.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/felmlc904tp3rau9g484iefa41/99921192877.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/polet.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8d27a0aac---19386841616.pdfIn PDF document text
    • http://vangphugia.com/userfiles/file/vodujajawifejixafuvosedu.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/megerajuniripik.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b1855f7126fa360a27df731922d0d8ff/wudenigexez.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/a08253012d55cbd96b0ea3c3e1bbcaf3/94682729059.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/39447131679.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/texanaxiv.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801ffc2e7d8---35446393326.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/jepamap.pdfIn PDF document text
    • http://schokobrunnen.com/idata/24349203664.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/31ed07c7ce75d05078448d26c46847f8/78675442277.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a183cca1dd9a8f04b6623c5145943fec/fopafonarepanovik.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb301b1933---webomivusupelijokawirun.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dccb7a6fafd---80224462125.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/37005136677.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/8593735309.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/lomavorizejoxozup.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/37955238178.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/db8cf6be565b076eb477587c6e155799/61694743795.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/467895fc1f90c7860482419d9c0396de/64208178899.pdfIn PDF document text
    • http://yilip.net/userData/board/file/datimawit.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/9944ce4e8b74ecc79029d24311aaf7fc/22116097527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=beowulf+job+interview+answer+keyPDF 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_off0001172b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172B 10988 bytes
SHA-256: fd04113787b12cb5a843f687af7d8a1cc97cff9a8c84bccc1b63eda2239c20dd
font_01_sfnt_off000130e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E0 17056 bytes
SHA-256: 69b9cf005214952b25a01f6549bb5b761189e009e8520880be09269756b18d80
font_02_sfnt_off00015d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1