Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d7b122acd56fe5…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 07:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e2a64fa9615f8a42020b9d00b3895b64 SHA-1: 8df51b0c5aaa234c46431ee0fc32d8f817931997 SHA-256: e2d7b122acd56fe5377104bd8cc5d9efe0920e07755d50892300529b5ad97c09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, directing users to numerous compromised websites and disposable hosting domains. These links likely serve to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://2-view.org/home/view/public_html/ckfinder/userfiles/files/11359211848.pdf In PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adc911b4645---bilux.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/jecb5hi25c2ubjun3tm8ovv840/nemej.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/19a24fa8c9a3c9e8cb2fab4ef77d3433/43757937154.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/wixafotowonajenugowatoxaj.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5220e587e---97348997728.pdfIn PDF document text
    • http://ippon.lv/uploads/File/kubejawerisiko.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/52044769470.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/raxugaliwululipol.pdfIn PDF document text
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/witozep.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/c51jmm2943jpbbfpc8u7lqc635/sokepe.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/rolerexedosadinemalo.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/43888745847.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160799ccc808a8---26788623693.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/gexozajikevojew.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/385t0rqb67t1hvnv9ibaedmrr7/22029644176.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/fozawemijo.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/geginan.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/wujuviwijuganidogezebuv.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/26568497281.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baed116b275---19529988405.pdfIn PDF document text
    • http://c-amc.com/upload/files/fefofunuteneviged.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/rodetepozuzifakib.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/t8f4hsfqj6sdh6leu5ebs0nh4u/jegagituwezomedutegop.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-7-26/20210726070256986496.pdfIn PDF document text
    • http://normel.org/files/upload/file/18711558771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=insecurities+in+a+relationshipPDF 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_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 10524 bytes
SHA-256: 8bb2f8dd408fc79405cccb657888655ceec2e9dcb192e3371066ae00ed50f290
font_02_sfnt_off0001185b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 17448 bytes
SHA-256: 6e1338d9b13c59e36274797ec40bd2f0a257fac755220426ab314c8d83ab3b61