Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a08f4f6e1290b4a…

MALICIOUS

PDF

94.5 KB Created: 2021-08-04 20:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7742ce8a0c6886e2484b5b86ee1ae6ad SHA-1: 964b0dd976a43a158a648910c10afd28a100ae23 SHA-256: 9a08f4f6e1290b4a37c805a9bcac04a241c2629b8b575b6c577e69146e54704c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that point to compromised websites and potentially lead to further malicious content or exploits. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5b644625f90229f5558de0fc433c387/20120899072.pdf In PDF document text
    • http://sgpeo.pl/users//file/wefoxuwowinap.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89c7948631---zupexezutuzugewawigijo.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/33929400261.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c848a35d0305b69b24cc727b167ba3f6/vutufusufuf.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/2f0b364a88f12c3eda3b3d6d1d693385/86878468641.pdfIn PDF document text
    • http://pvvc.cz/files/72752304703.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f33290c746d---86123191534.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/rejupavedafa.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/38437679775.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/99386161555.pdfIn PDF document text
    • http://4bx.pl/public/file/16678445970.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160792fddec51d---jesukenumorifitewesafo.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/7cd13da776afe5a7e49481d4bfc548d7/95333495211.pdfIn PDF document text
    • https://www.roadsafetyrental.com.au/application/third_party/ckfinder/userfiles/files/duvaxosimemaji.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3193db6a7---63286366876.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/43056522646.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/11410413226.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/87956511475.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/48500446506.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/971nkaqtemmevai7k99u617ggb/bazixuwiluxobezesaterire.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/56294044684.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/14017547828.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f51fc52db26---bajemoximivorejude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+status+saver+for+whatsapp+business+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 11080 bytes
SHA-256: adf360bf76a1d1bf352b5930ec15f0cba4739196b83a066863d029719e846135
font_02_sfnt_off00011a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 18736 bytes
SHA-256: e695b94114533d4f1c94b0fcd0b9d16c0ed18c64341b956964d5252558514eb3
font_03_sfnt_off00014af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF3 1760 bytes
SHA-256: 478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
font_04_sfnt_off00015349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15349 16424 bytes
SHA-256: f616a024c9c4d9ba803c2732f8190c1d6a63530743315e34e9870f901c0cac02

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