Malicious PDF — malware analysis report

Static analysis result for SHA-256 3824ecadde8b9924…

MALICIOUS

PDF

98.3 KB Created: 2021-08-15 08:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: d10f035ff86ed7f7e040e852e0cd5479 SHA-1: cb8c88552484d5b8225e041024c85f38e7846f29 SHA-256: 3824ecadde8b99245f0a480acc4807800b0565836daa83918ecca668bdfaf8b0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160fe71366e6fe---13717391602.pdf In PDF document text
    • https://iltuosarto.com/file/82984259673.pdfIn PDF document text
    • http://www.heksan.com.pl/file/luwifexeza.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/53283442659.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/81675002704.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/nafaboloto.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/0dcb59c2c69cbee96b6a1ea9868747a7/92862976673.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7fc805ca2---bigobuzizaneluli.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/naligowub.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/gezezozosaxenum.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/miwoko.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/pibilinipewesuv.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/45581570571.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/5716261940.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ae76837c6---labepi.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/62523142927.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/lff3csrh3v59mi2ahh9u0fhn6t/78961257590.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/57510568320.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/48e97502b93b296175a4b4c63122e378/80641152391.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/73259549281.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99e5075bf---daximavulusomozojekobabo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee9e8387ce---kataremapojapigaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=non+mendelian+genetics+worksheet+docPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAD 10972 bytes
SHA-256: 706c145ad5178efaef54e02d9a9ba91b151c946eb6edfc2a61143b91d82ee621
font_01_sfnt_off000134c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD6 17772 bytes
SHA-256: 87c42bcf022cd904331c221747dcaf80a659bdc7ca9c836f5adba401888d2b43

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