Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6045b6c1ce8a918…

MALICIOUS

PDF

107.0 KB Created: 2021-08-24 22:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 6dc6af2e933ffeb1186fdacbc37fd28f SHA-1: 498345148f9402f6d8dccac3abd4b1360760f58f SHA-256: d6045b6c1ce8a91888f0855117f7794446e785cb843a6785d69f3c6db28e8f68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://monyetjoget.com/contents//files/melubulizigebugej.pdf In PDF document text
    • http://yves-segers.be/userfiles/files/likexanezalejimebupigaxi.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/92eb6b0c85c7e131e35ebf6f8e5661fd/gapezulodupaliso.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/75815001481.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/23295401415.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/gogefapawisoguwonorog.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/42619989642.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/7c5fdc3a0d95b3a96a535be98b29cee7/vulolazolad.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f87f346ba0e---vupoworukuputo.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753816cc407---95119033693.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/6870072912.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/70644244743.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbce178a70---94312065779.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/derpfppjhqk55vl6o5uvpf9acb/90857258330.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a65f1534a7a---84370110875.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/zozegobejokod.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95af93e4e---zitonumulebane.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9c0577213---ruxip.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/96264105457.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd8b1444a12---77533082396.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/gevumosipib.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/xamobipipanerorukunen.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072516323779.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/fozavigomowofepigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=jee+mains+important+questions+with+solutions+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13916 11088 bytes
SHA-256: ed873101af41cb085e5b98814c1ecb30bd496c475343abb4479637299db8ad42
font_02_sfnt_off00015288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15288 19780 bytes
SHA-256: bbfebd336b9c81c84103672616d00b543219686ed93da29c4e2144a183d51ef7
font_03_sfnt_off000187c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C0 16092 bytes
SHA-256: a37c6052708a11292b84d6ddbd984f933181f63e6b3fea8565785f9b56dba974

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