Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b327f10cb7e8c…

MALICIOUS

PDF

73.4 KB Created: 2021-09-27 08:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c8f01e315843e1086f988dc6d9bf8642 SHA-1: fe3124601e02e87c27f6aba315d2c3dc42601e41 SHA-256: eb1b327f10cb7e8cf5ce910dc9803a02ef05b0d9b4b7984d750149a05f552f6a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing campaign. It contains an embedded JavaScript stream and numerous links pointing to compromised WordPress sites and disposable hosting, likely intended to deliver a secondary payload or redirect users to phishing pages. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute malicious code upon opening.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149d78c97a12---rededewepimapedolep.pdf In PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/372e8e5f410fd5c896b97820ae851d08/xapofulegeliserinofejete.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613099588b341---fobalezarijupakumonotet.pdfIn PDF document text
    • https://bursac.net/userfiles/file/selopubozatu.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/kadodibofonewu.pdfIn PDF document text
    • http://hexindechem.com/upload/files/zaxedejofezasazoju.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/988571861.pdfIn PDF document text
    • https://msvadba.ru/files/file/vizojo.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/waxezoduvebuvojejegabe.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/11661725867.pdfIn PDF document text
    • https://webaruhaz.codefon.hu/js/ckfinder/userfiles/files/54559947879.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/79803029981.pdfIn PDF document text
    • https://swiz.eu/files/editor/37126371552.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/93295554436.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/25928683261.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/67317415664.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/5797352355.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/56581790898.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/23984144950.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/53872379554.pdfIn PDF document text
    • http://mlead.net/images/e/file/sidenotudepupow.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4lc8ps7n0lvb1b1r1c2pt3jtv4/33983617745.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/bifiwamef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=whatsapp+hack+sniffer+v2+3+apkPDF 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_off0000b939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 17992 bytes
SHA-256: e3d4473cfefb24ef1d92a0a546315e89db2436dbcf608efa07098778089d24ca
font_02_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 10856 bytes
SHA-256: 605e326b1c4a3aafc862a9e940f56a582a1fcbe4486b30b8269c747c87220b66

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