Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d4665336467333…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 05:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0720b16172d26439c1b27ea9668512a1 SHA-1: d58ba1803733a9374269f8bccb7f9bcedf5295c2 SHA-256: 80d4665336467333c773d9cd0054d68839f3c3ba606895e49d4690ea439a1c87
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves luring users through a seemingly legitimate document to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.pvvc.cz/files/wetifuruvon.pdf In PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16120bcfd09e1a---koteviruvom.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/oqa1dv4rmtu0ga7klje8nhe193/12596738985.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/49078323401.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/fn811j9am4e8hsl3gm62bfa9o1/vedomor.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/tefiredokegesinebuxot.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f53fd59755328db2f19da476d138b4e7/mabexunapotaxasegow.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/28122005616.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/37lnbmhfh86bceo5599n6kulqn/nibubelonawav.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/funomuvepad.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/3987384722.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gsojsdtcic3e8paj35gl1mbt28/nuxiduzaruweva.pdfIn PDF document text
    • http://ranch.pl/files/file/21759216443.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/53724434837.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/23947992432.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210903184956.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16112f5b59c33a---rezigupoliravivokiber.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/tezegupedes.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/14620236543.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/sujib.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cbca6fe722d---49789777247.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=anatomia+de+la+arteria+carotida+interna+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD75 18236 bytes
SHA-256: 0b49b7115dcd5da1fa21414fb9f66af63372557f4165af4228e7c0acfe820fb5
font_01_sfnt_off00010c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2A 10596 bytes
SHA-256: b1b95098630670a148dba7de66f8e382d6a00ca71d245f3eda7a2b49c987c80c
font_02_sfnt_off00012450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12450 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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