Malicious PDF — malware analysis report

Static analysis result for SHA-256 54203c3f3199f7e8…

MALICIOUS

PDF

93.4 KB Created: 2021-09-18 20:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 69cf1131beea68c66739029423685dd8 SHA-1: 3c40037a633b70523cd6853ddab1a5b662d9a5ff SHA-256: 54203c3f3199f7e8805ed1990581ff378592d0323a261519a9e09bb64a5e7511
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. The primary purpose appears to be directing users to malicious content or phishing pages, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://crysiq.ru/uplcv?utm_term=far+away+eyes+tab PDF link annotation
    • http://ityab.com/cache/fck_files/file/biwuzilugeleladanafamov.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/5324633696.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16142f3ea8a1b6---79528837931.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/ladisike.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/fewofu.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/gerajesimaporigabeduma.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/woxulajovoferaped.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d609ae4605b27a90ff132d2b3855b5dd/33516043439.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/45013175338.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/88973499061.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/reduxobemanorowagigi.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/mamaluzilotataderidat.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/xozane.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/14016492411.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/90955105389.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161446710c8506---tunilitutirakelelosogelo.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d07bd7d026---85050792790.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/58876005286.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/33607984694.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/dovukazupezasa.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613761d4e3aa4---69118575573.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/daronelovuropi.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/97686378127.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/towipolimobexegoreguzus.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bimofowozepe.pdfIn PDF document text
    • 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_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 18460 bytes
SHA-256: e32e3661ab216bead35a41d6e562aa5e9135df57dc6b32b96847e6a0aba7f5c1
font_01_sfnt_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 18812 bytes
SHA-256: bcde2ef3f87087d50293b6a100bd646c39c7f7e84978817189137d7e385e1fa4
font_02_sfnt_off00013955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13955 10056 bytes
SHA-256: ee614f2f0684d6c886a7608a56f10053f415b9a160f379e4cd3238a24f153b40
font_03_sfnt_off00014ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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