Malicious PDF — malware analysis report

Static analysis result for SHA-256 700f2fcbb477abf7…

MALICIOUS

PDF

73.4 KB Created: 2021-09-11 02:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 55a8414e526d3622df596a5338d1f565 SHA-1: 270100462b9f5c09df7ea172565d7de924ed9d57 SHA-256: 700f2fcbb477abf76b4223d75dc49cb4bdb92bf51e4d38673eb5ea656fe9ab6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm, a common technique for distributing malicious content or conducting phishing attacks. The heuristic firings indicate that the PDF is designed to host numerous links, many pointing to potentially compromised or disposable domains. While no scripts were explicitly extracted, the nature of link farms often involves JavaScript to facilitate redirects, hence the T1059.007 technique. The primary attack pattern is likely spearphishing attachment (T1566.001), where this PDF is sent to victims to lure them into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://hazeloyun.com/calisma2/files/uploads/gulejugasijepanubafog.pdf In PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341d1839b4b---fubefasapirafizilopaw.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/82962703770.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/taxerorotu.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/befugukajorobagar.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/padabisudok.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/45873966490.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a7a7a501aad640426d59005fd2172342/21117520522.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613077590b658---77168334046.pdfIn PDF document text
    • http://childprotectionindia.com/lexcyberia/userfiles/files/kubedavojali.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/3c3868b2ad1e4a1f4f9695da6663eb1b/bonobifidukojilumibudofe.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/bukaloripisov.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ecff264803edefdf5cf9f01c6eadfb1f/fojesuju.pdfIn PDF document text
    • http://mayjack.com/upload/files/jovulosa.pdfIn PDF document text
    • http://lg-palette.com/upload/files/54281401403.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/wifuzavobibegagameje.pdfIn PDF document text
    • http://belv.ru/userfiles/file/tulap.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161304af02fcf0---42956741625.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/jegamiwiwel.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333812940ea---41043814037.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/darilopudobufegiruzesotaw.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bt8618pic32evdrukpkj9rqg9/89979754798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=redneck+rampage+androidPDF 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_off0000bad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD7 17244 bytes
SHA-256: 570a15c09ab295f84fac69841103eb4df45bbf928d11061954ee59953d55539d
font_01_sfnt_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 10680 bytes
SHA-256: 935eb90bd8f95b031045ed06d95963fea03e264ec92412e70ac99c4de95af919

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