Malicious PDF — malware analysis report

Static analysis result for SHA-256 06212901aa9fb634…

MALICIOUS

PDF

87.6 KB Created: 2021-08-03 15:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 10e85d8451ae8e55c6ada94173483470 SHA-1: 97d7f4521c122e2bd3a0dd39701b1fcd781695ce SHA-256: 06212901aa9fb634c890d053ee5c59b6d57718484d25ad94e059252e52d2495b
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/6c3phbcjur1vg7q73kikupp673/25738700358.pdf In PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/4fb79e6573f396e647d3b8bae1105a1d/14239969711.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/3977918769.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/ragixiwagafuxenefizu.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/gubemowelofajazoz.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/47970340751.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0c4a8830f73b48092feb091a12820a8b/ninerabazupibuvamug.pdfIn PDF document text
    • http://ipllaser.in/uploads/6356667907.pdfIn PDF document text
    • http://wernitznigg.at/files/jobinigodinetukizabiv.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/bepodesasesolefonix.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae6cd8a72b---pewomedikage.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/giruxibup.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/pupeged.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e5164ae9d85f4e83b793edcf3027bc6f/37608751498.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/55758481799.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/kuxesodobedal.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/28142155142.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/83824391430.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/57801148268.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077d332918c2---lowuzavesosetonanasip.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5571b7fd9b88b5b2587482b30561f125/weporasulagipokojap.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b02f1d82945dab3e43d8d3be4b3900d1/99809791080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=android+10+anonyme+anrufe+blockierenPDF 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_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 10972 bytes
SHA-256: 14061e990397e8459940c887b348ec8cf41e98b9e4d456cc0de7da019275c410
font_02_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 19400 bytes
SHA-256: b069f39626248337a234ad55c7f365c96bfebd57c277b2c5fa65b16212bc2089