Malicious PDF — malware analysis report

Static analysis result for SHA-256 14836e7ae0463aff…

MALICIOUS

PDF

71.4 KB Created: 2021-09-23 02:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ca618e1b0f55f41f65dfbd1b30389e8 SHA-1: 8a7b9bed8ee02e715a41cf3df8f7ea9dc7c094c3 SHA-256: 14836e7ae0463aff8d6f4ce0276921c16726698b9d797ae2471a9acf5036a3a9
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 malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of multiple links on disposable or compromised hosting suggests an effort to obscure the ultimate destination or to leverage existing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ecotranslation.ca/upload/editor/file/vavavelemamikeruvura.pdf In PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/8fdf2118de5374db1a39d47a9fa4c7d0/zetixijagav.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/33158872529.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/26397320390.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/41982021626.pdfIn PDF document text
    • https://goodnest.info/tctt/sites/aaa/file/43647523373.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161470dbd08981---pesedakoxetot.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/5866363018.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/zigol.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16142e9784a342---74589883105.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/zerovi.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gotojukijexen.pdfIn PDF document text
    • https://energooptima.hu/upload/File/vokufixomilise.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/99233844044.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/wasabiso.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/nofividu.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134e30933c00---setel.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/14029629433.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/78962426727.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/96623735420.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/93878975350.pdfIn PDF document text
    • http://juha.be/_files/file/wokojakibewererawulo.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/tosutebonokuxalixi.pdfIn PDF document text
    • http://vlajamo.cz/images/file/55560605996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=hisuite+for+pc+32+bitPDF 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_off0000b5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BA 10684 bytes
SHA-256: 54e2ba608d3625355ba560163ad7c5c849a0699bd6854f4cf69d4f075777542a
font_01_sfnt_off0000ce3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3C 16552 bytes
SHA-256: 4a7c19797a2f7c472d46be28b27cfb6e703a18027929153ead3379a5867ebc1d
font_02_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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