Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fdc5d3739b119d…

MALICIOUS

PDF

84.7 KB Created: 2021-07-15 18:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3795f1022806feabbb82436f30e3f7f2 SHA-1: 6fdb3765ff265492bf43badb5801bff9e4c21da0 SHA-256: 41fdc5d3739b119d8a692849ab979fc7da3474b4f270e025611a4452a08f1738
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 it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to potentially harmful content. The presence of these links suggests an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://alutat.com/data/file/zawawaxozulemukobetew.pdf In PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9517d4a215---23307159605.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/65802014870.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/err2l4p8chf39ai3smdjpjh4a3/63749233581.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/p7q4bvmtbr73b7b31vkt7kqed7/logojadopilovoked.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/130729e7626612e9fa643f9aab7b48fa/65245023508.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/67968725777.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3fa0d00bdf70caff0141e9316c7e16b5/78807877285.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/gosodoz.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/96511026499.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/b971ba2ff9ab67d133704e003f668f54/98009052741.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/15447478595.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/zanoni.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/57423323965.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b05a5f43b92---31425947145.pdfIn PDF document text
    • https://limmaginebistrot.com/file/tanuwatopubetij.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/nopol.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/87670270764.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/rulewiku.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/91820123075.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/ad576e9903135daa52390fa6e42c78e5/divetosor.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/mipiwapifibiludop.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b530488994---zumugananowesogoparali.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210611_4175390B767DA440.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/15627038497.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f276d29b68---nazufovefigugezibediku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=seelie+fairy+meaningPDF 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_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 10360 bytes
SHA-256: ad7df273415201425179dd6eb3a4c44daae2380d57ba58ba8e1ed7b9b1d6090c
font_01_sfnt_off000100aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 17200 bytes
SHA-256: 89eedcdb4f7008ce2d488918ad78c698f1e7b745e38ebe41c077ddf45fe067e5

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