Malicious PDF — malware analysis report

Static analysis result for SHA-256 292f34b343da71e6…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 01:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4dcad02945792aeb95c5de06eeeeb8f7 SHA-1: 117ed2b6fdc3464b1bfe3255d61551ee7b919cf7 SHA-256: 292f34b343da71e62c2089ebd0abdb50e91466a5d05b095b3465a291a0b59a3b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 4

  • 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://simsvizag.com/contentimages/file/nofunabalisaviwutejave.pdf In PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/falevobekaguligebexifeli.pdfIn PDF document text
    • http://orlickachata.cz/files/files/71540051871.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/begirijom.pdfIn PDF document text
    • https://airshow-bg.com/file/66697495558.pdfIn PDF document text
    • https://ksuskalology.com/images/file/11027494927.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/dukimapevufevinofipo.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/22562032125.pdfIn PDF document text
    • http://wmsone.com/eimages/file/40164596983.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/rojagumozekixewuko.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613936b09f737---dizefol.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/fidifunarega.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37327706554.pdfIn PDF document text
    • http://186086.com/upload/files/janazerajupikotugagun.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/14039734478.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/nilufivegaregelatidajibik.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/bivom.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f1f09efce---7182297573.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/98159797933.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/62327853060.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/43168030759.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/56438498081.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/11819581021.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/widivujenitademiri.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/62205638125.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/rasokuzajoxudewa.pdfIn PDF document text
    • http://harlit.com/upfiles/file/62630734023In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=sexy+games+3dPDF 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_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 17672 bytes
SHA-256: 4f4ec4287d1ff4e42d1ea5f31c5e359c1e9c1af4e583f2a2f0a273d334e65eea
font_02_sfnt_off00011f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F16 10496 bytes
SHA-256: 7ba44fc83ce0ce0e2a06ffeb870d711d73ed42cc38a0b00bdcc8eb67e8fb4193