Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f97d2ac7c12cca1…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 01:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ed65cfa0d17c5a117a710549d6a65731 SHA-1: 3a24673f5f88e225468d9d3a19a7e65f933e402f SHA-256: 8f97d2ac7c12cca11bf19ff925621f68e192b8b80e42ca758d6625086b47e71e
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://bisenzia.it/userfiles/files/ginesogofunamaradaduji.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a5b120289---80366687766.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/142620265.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/vadojibuxonoj.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/e38225c609d4ff90aca6a036b649acf5/59812851083.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mikinatowevixolimin.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cccdeae4b4---74587046315.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/moglprkq0209tq38dkj6lpeu7d/vezabitoxisozupif.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/xixosubebinitiparotijolop.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/79534263662.pdfIn PDF document text
    • http://elitvorota.ru/f/file/86629982227.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/3810558299.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/regerubokuretugawane.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-25/20210725092015744764.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/bamodi.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef915a58a7---jasudabibogonujap.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607034c125bd5---42209850205.pdfIn PDF document text
    • https://eventaipei.com/upload/files/69659889831.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/64944128365.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/405cc9936fd7599ffd9cc401d2efc726/19900222965.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/rodow.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/1f2g9esqn32brq912pea15pn44/romupaxunibute.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863c012dbab---91012470058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=you+are+my+proudPDF 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_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 19376 bytes
SHA-256: 0b1891f86b5eec6fdf1c3c95541df215768c3a78d98fba5066ad89bac35df713
font_02_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 10244 bytes
SHA-256: f964df8d960923cb6263f0b4e5e5720c132b203851772593d69882b67d39d95a

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