Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56e53bba29acca6…

MALICIOUS

PDF

83.9 KB Created: 2021-06-21 09:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7a46c72f666cce62451cd0b0a4bd864c SHA-1: d4093e8c08576bbe849618ea3cf755f0fc1522ee SHA-256: f56e53bba29acca6e122529b9042078586ec8fe6d5f6fdfbf62242e614a4fe66
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to various URLs, many of which are hosted on potentially compromised CMS uploads or disposable domains, suggesting an attempt to distribute malicious content or phish users. The presence of a 'download button' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://thesnowmanicecream.com/ckfinder/userfiles/files/jizisonezawadex.pdf In PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xenuparolezitugoxi.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/xisuwenada.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mu58i0utn6fj3e36veqlstbv73/gufisavotosirosodadifana.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/maxuwaxotofasekojudiru.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/xasagali.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba16d3bf2e4---57634849828.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608819dbbb1de---64076723745.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/0b9lequaoaqjg7vu1vfb95h08r/weputanosiwizumaxomagu.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606c892b30969---bojelatolesirijafuvarodos.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/dobonogidenuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc713b2ffa7---raroluxetakizan.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/fafizodogasa.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/51360861076.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf3665d11---84295497124.pdfIn PDF document text
    • http://goref.ru/files/file/gojugesebimebowubowolupol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d6a1b482b---roparekajos.pdfIn PDF document text
    • https://makenie.com/upload/files/98207018461.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=knowing+our+numbers+class+6+questions+and+answersPDF 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://scripts.sil.org/OFLIn 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_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 5740 bytes
SHA-256: 40c6ccac14b748b248d48c4db391f74dcff13388eaae4c8d7b1e2ad7b4ad0850
font_01_sfnt_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 11124 bytes
SHA-256: b0d455c157a6e02c5710d95d702bfd0ce6c547e6553c2e7b7ba54f9116b06a2a
font_02_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 16220 bytes
SHA-256: 5e5a83dd4cded0c7f6a748d9689560e110713fb883a488bda1a1a5043b06e404

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