Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed03e08d4d19ee25…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 22:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b71ac212830c05e95414a5af8a6f8eb SHA-1: bfd0aa3ff9fd9209ebc7c8e9380665ba1312a4d5 SHA-256: ed03e08d4d19ee258586685df2d8bc7d113d9655eabb3cc2d6ca4c5860d6b176
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the overall structure and URL findings point to a phishing lure disguised as a resume or document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelesiuvalymas.lt/i/File/wofizovorolanozes.pdf In PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03a08254ba---sesovaze.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/5589405753.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/61429897540.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5be67f0a86ceb5edcb8ada46d9f0d85b/56677365525.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/ledapiropetojiv.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/15871e2ea823f348205def08ebc07b5c/14634457283.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be156c82e9f---53611406150.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/54398690538.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16132b5cfc0169---vowagejoganadukowevus.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160968bca13175---54869219527.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/bularudorejigakata.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/jebureresavefopexofepito.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7294c1d68f283fdf12e54436045d3bb1/17497784242.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b2e9da56b---vodafubejitezelunij.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/d0a56ed12b1808148ef53660dfe6367d/sutokoti.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1c2b25b11---vuziwotatopisuni.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/64087276586.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/juxatituzobuwemugepuj.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/foxazesosarewesaralene.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/16524689648.pdfIn PDF document text
    • http://fotossc.pl/_files/file/21199423589.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/lonosakuruwupeduxumebil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mechanical+maintenance+technician+resume+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_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 10860 bytes
SHA-256: 89844581b71080f73f3e30d587013b10acbce695cd5185b39ff851fb8871f524
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 18300 bytes
SHA-256: c1ba3022379fe389fe4cfa1e1e2477f0aedeab6786858268ee71e88fffeff7c2
font_02_sfnt_off00012bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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