Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60d45e0f77f6ff7…

MALICIOUS

PDF

76.4 KB Created: 2021-10-04 23:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 99a5b9581e8f6e038f7e7cfe36bbf236 SHA-1: 90e3cd3da53fd811ceccdf0ead2d9a55a1793583 SHA-256: d60d45e0f77f6ff73a69f201de512cc18d8168ce155d8b0795a9398aa1e7766e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://pogologistics.com/ckfinder/userfiles/files/37448710899.pdf In PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/5400523123.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/siwaju.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/73890175890.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/wiwevupimojilibonituk.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/89186778535.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/pirizagevizofenodonujava.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/naneregipufidono.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/tolojoluzotim.pdfIn PDF document text
    • http://dgkno.cn/upload/75609510603.pdfIn PDF document text
    • https://fq.ua/images/file/46221731504.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3696089a8---74413347508.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/xofukojilipeva.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f958109d892dd457b647c7b4a8b682b5/4948342236.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/53400881156.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/15729455628.pdfIn PDF document text
    • http://weingut-suppan.at/files/zajonokivupolixawuma.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/sodamuvo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/912cf2610a7b5f843c6c0d2fdd3621aa/sufow.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/62227588660.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/sirasovedasaru.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/zexoxiwitogili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=spend+3rd+formPDF 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_off0000beb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB5 21004 bytes
SHA-256: f2caa8fb5e496a7410e919f099b4616e6f41d8bb7d81b7e70113434ee025dec1
font_01_sfnt_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 10340 bytes
SHA-256: a2d811048f2b84b09419be9890f0dc077dc8c3cc84d6c3ef2c320eb95683c0af