Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b331f2915ab391e…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 07:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 37b23102730f54722dd2d33151a5d2ff SHA-1: 9f0a83778cbdae3381dd3b6d756a196f52a44315 SHA-256: 0b331f2915ab391e5069ec2a38479ad326797494d12b31c0ce240e16df10f2b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The numerous external links, many pointing to compromised CMS upload directories, suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm indicate it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6b6dad18---nafiladalugemalazoxul.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29113c6523---4698529557.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/90056709372.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sitagiroropezadovom.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/vozedepilop.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105ac89d2f24---52217914500.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/xogan.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/28377937494.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ofa5bt5r6v78mpc376bs6pth6p/figemevonoxururirenovirop.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/23441234417.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7692adda7---kizizexijema.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/49792992332.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/a895v9ur4fv3q6v500kf95t5ov/vigoxuturilozidagogagipov.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/634ektehcurjmd6gb83iqivp42/webefev.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7af5730a67---27805657137.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/37734624858.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/salubanedikusoxozin.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a375e353d7b---xuzavonukaxojigefiler.pdfIn PDF document text
    • http://msiutilities.biz/documents/30234570072.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/tjd11flsp9quhsvifcjld37jtk/rezipafiv.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/61593135794.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c1b93c07724b30b12ce9dcf71805716f/lurotakepusixaxeg.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0827080001627957479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=centrale+menu+pdfPDF 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_off0000d2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AF 20560 bytes
SHA-256: 37346d7f9bc04bb7eef9137067b820710b0c80ef183f15afc2e29ca1a611562c
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12001 10412 bytes
SHA-256: b8c8bea5218fc7db9e2ff811cf618346c80b0f8931d02d3581a1339c150526c3

Open this report in the interactive analyzer, or submit your own file for analysis.