Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe70e07b311639e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-12 16:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 60db0b4d5150682243b63335fc7e6ce1 SHA-1: 211632190815d262ddaa2562e21b16159d9b6792 SHA-256: 2fe70e07b311639eb03b6057cb123eb1cd70857c1734f94b9eb965e61c2fc76c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and link farms, suggesting an attempt to host or distribute further malicious content. The presence of a download button lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/897f56fecdd1ed648cf85460981eb588/gadelatunakunoxozes.pdf In PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/gaxefos.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/kejodemabibivudurufufelum.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zavevuna.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16131bf8153a1c---sogogu.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/tezekirujexi.pdfIn PDF document text
    • https://emprenderem.cl/files/48971584955.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/nezifavifibuwabejadisogen.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/robesatisuvaxuzagit.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/59669890512.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/28156657848.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/24308032956.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c359c7b07448a5a20086cfaa8e06be78/malemuwosananumudo.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d13bd37bdbde87e66c61ec6b024a41c7/bedijopufazarifirotela.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4899da662---84628029558.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/pinowemafodi.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf8a471056---lovizutidojutuxuvef.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/pagofopovena.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/24731521555.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/30766025738.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e488681b9---98934010498.pdfIn PDF document text
    • https://tekartltd.com/upload/files/5892854467.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613a187461b35---jazafedopuzeraxovu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/58e6f2c8d817e6a3b047caa74af368e9/pigilumaxarato.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/rivimixedodotodule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=disha+publication+books+pdf+free+downloadPDF 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_off0000cfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCA 11136 bytes
SHA-256: f539604ec6738778fd1949b17bc50a460e413adaff2d12fb490039722169ffef
font_01_sfnt_off0000e994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 18876 bytes
SHA-256: a3dafaf07140aef80912e8a4d415b74317e4887bb91cb2c3f5669e2c5d98ed3e
font_02_sfnt_off00011af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1