Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb55ee99fa622be…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 00:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49700817cbd4b4b146e7eb431f49da9d SHA-1: 1389148bac4f452894f0030a61050a33473df18e SHA-256: edb55ee99fa622be0f6f7b554287f219a7a575c53bf17a087fe67674a4b564c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=companies+act+2013+ipcc+pdf PDF link annotation
    • http://tubemakingmachine.com/uploadfile/files/siroxexulafetaku.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdce493e0c7---21771754062.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/92370628767.pdfIn PDF document text
    • http://web68s.com/upload/files/fazokizagabowegafab.pdfIn PDF document text
    • http://candientushinko.com/images/file/tamoremonulodel.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34c506677e---23436630870.pdfIn PDF document text
    • http://lblussana.it/images/file/84438430892.pdfIn PDF document text
    • http://signauction.net/userfiles/file/47046519916.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d972899b20---kekubujatomeva.pdfIn PDF document text
    • https://digicpictures.com/downloads/dilefuwarefa.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c01ca5302---46435921437.pdfIn PDF document text
    • http://freetds.net/userfiles/file/vuxujifobujufunadal.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addc1b683a9---65323914622.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210618071025.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/l1bso8aqofitj1pugc0ohf7fl7/28210681294.pdfIn PDF document text
    • http://amirmazandaranihospital.com/ckeditor/files/files/28013537159.pdfIn PDF document text
    • https://robertbah.si/files/file/jedajafuleku.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/36171792203.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/tuwux.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/4ced879fc77573743940cd181a22d244/40466616550.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/vewuzukawule.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8feefb86ce---kiwiwatuf.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/vuvezodeximefuxadaxebuxo.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/3432f5252e2cf195852f7991801901b8/96112026523.pdfIn PDF document text
    • http://valeneighbors.com/userimages/befubirezu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 17916 bytes
SHA-256: cd43a29a47c784e284f46c56d1569e0ba99ced7ccc017b3eba77dbacd24f9e50
font_02_sfnt_off0001261e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261E 11132 bytes
SHA-256: e96741527edd4e4e9a2fa377011725fa04f750c26e15eeae707f1756ec2ce21f