Malicious PDF — malware analysis report

Static analysis result for SHA-256 975adb20e1017b54…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 00:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e43182a863f2ca7a7fb66eaaf1ffb344 SHA-1: 2baf54b95b02aa4b4d8db66ad606dcdadaa1b9a7 SHA-256: 975adb20e1017b542f57e0ce641b1b296ab8f350f40bb41bf236da73ecad2cd5
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 a machine learning classifier and ClamAV. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content, such as phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://aradovan.com/userfiles/file/junutifija.pdf In PDF document text
    • http://abyss.sk/userfiles/file/56407344046.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/78762293313.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631916096.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/gududutasimamolutamede.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/75428797592.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/kerewatav.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/0728dcc5fbb82fd586b2f044cd23ecb4/xexipezesinilivufata.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/29541641652.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/47851921527.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161363d54623b4---kobujinajid.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/nixokovijija.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/69423205036.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021091804283173499.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/zagemogowenil.pdfIn PDF document text
    • http://elsped.hu/files/file/47488720927.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/bigoreve.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/63567442757.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/161346c5c59798---dekonijijuwomanipagi.pdfIn PDF document text
    • http://fedime.org/imagenes/69513612002.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/56738265750.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/29710960178.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109020304258221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=beauty+and+the+beast+full+movie+putlockersPDF 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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 11448 bytes
SHA-256: 75beeea0286e09331a21c4e6f7e753274f18921c6f9f7ddc79440ac395f49e71
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 21292 bytes
SHA-256: 6fdfead893f54acdf03337648c1d02c81fa9982262977b5ab0347abe2b931be2
font_02_sfnt_off00012aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1