Malicious PDF — malware analysis report

Static analysis result for SHA-256 a203b9603f64c976…

MALICIOUS

PDF

72.7 KB Created: 2021-09-06 07:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8b514e81b4cd52bb275fa955f2ae4de9 SHA-1: 38ca6ebcdaa6caaeb2be94c4a6ea167b3daa03b3 SHA-256: a203b9603f64c976f81112d31cc0a75f2184ea7dd8e4e9d8f509b0563bf05048
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure attempting to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://sbox-technology.com/upload/datoteke/84768988492.pdf In PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/11828479337.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/kndq1vuc3cpsjvccktdanbcr0h/23152961539.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/28739715395.pdfIn PDF document text
    • http://chapelguild.com/images/usr/paliba.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/zeladusajawut.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/25263142129.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/218988627.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d9026a5d7d6f28a239de1e8e785cd287/77368415396.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/18609789499.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/5d13ed0b7848ebb5213c7eb9c3500474/marigozufukuxuxedulegeku.pdfIn PDF document text
    • http://panteres.com/files/files/semapol.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f543e2e428ae9384a7c9a5790fda6c17/fasawidobamibisaf.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/fapep.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/lirefevesujuzasopajon.pdfIn PDF document text
    • https://slide-bearing.com/d/files/94635933179.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/18137304850.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/rugabo.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/80893183092.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/4965259945.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/36395927148.pdfIn PDF document text
    • https://irantruck.ir/data/file/gikedave.pdfIn PDF document text
    • https://alternatifhosting.com/calisma2/files/uploads/womuzatokojuxajatunenokon.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/38171525395.pdfIn PDF document text
    • http://boldogelet.hu/media/86245354780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=artool+stencils+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_off0000bb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB30 16400 bytes
SHA-256: f3a9266de39c64160093c6559f3beae3de1e11fa3b37b37cbc6ec64c7d418272
font_01_sfnt_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 10432 bytes
SHA-256: 084aacec2b50be62a4eb350bf1f1c5f7f23d26f0d93be4529a6b0c5fd9e3eb70