Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbca8b1c41c85a7…

MALICIOUS

PDF

115.9 KB Created: 2021-07-27 23:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd622effaff6ea8d1be055c8a6d00995 SHA-1: e411a3c4433d52d732e0ed76d4084d9ef3a2a18f SHA-256: 6dbca8b1c41c85a740b7934e8169a7316df1bc708ce33dacf1e723e51b764cbd
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9842

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://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/cd04ba71f9a7cbbbb8f0876a490a952a/vawosozebetotujifavivit.pdf In PDF document text
    • https://vestol.bg/files/file/40631312050.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/6cfb2036c20fa431655d0e9028bed5fb/xifowofirewesi.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaae254d96---11585701396.pdfIn PDF document text
    • https://bursac.net/userfiles/file/28152865095.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/savamevegesa.pdfIn PDF document text
    • http://humanlitech.com/files/files/64855145351.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/afdd08c9849ba1984860cf021a552757/46362621029.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///90260367990.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f80f7c5029---69998394908.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/cc6da9e7b91a3ad7fe1c2d6b7082475e/93666679519.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4c6649b6774cc6957e161b96c03df635/25513681798.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088246282529---77233888842.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/2vmkgf3l7u2ajnog4skinco1ek/55135262949.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/gujumarunuxizixikekonawon.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/26136507496.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607c507ade919---14674937981.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/vesesipumapaxekujokek.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/238591347.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6d79e5a5---52769363140.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e938ba5844a---72198343692.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/c9d54a92506edbeef136382d83ae3066/99598248692.pdfIn PDF document text
    • https://afayl.com/userfiles/file/tusiferutiteridurivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+karate+kid+%282010+full+movie+in+tamil+free+download+3gp%29PDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9f973527ce---kusizovopesobulez.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1C 19476 bytes
SHA-256: f2908d9ec8304e7e11f581cdb9a33b44bb25359ee3882b2958e9071c4a3c79d0
font_01_sfnt_off00015f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F2E 15180 bytes
SHA-256: 6384b4b49b4d23765060f4f289ec4f0676d3668787584f53ae2941b8ee9b18fb
font_02_sfnt_off00018bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BB4 11704 bytes
SHA-256: cc4b71f8cc86272ccc0f179a17ecd30013986aab89cdf9f8d7174b864c3af44d
font_03_sfnt_off0001a77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A77A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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