Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9953d3e11d9e1f7…

MALICIOUS

PDF

77.4 KB Created: 2021-09-02 00:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8270b96967adeb76a8d9da703118c8a3 SHA-1: e0b6f0e4e34ca1c605bd88d774de407a8eae6b41 SHA-256: e9953d3e11d9e1f78dc25cd5b97bef4720af98436c835a5cc6d7ae3dfc34da98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16074390bdb700---81287368485.pdf In PDF document text
    • https://areicon.com/images/file/kusenepateni.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/a49ce24cc7552d6e5473ba7fff8b497e/92677024081.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/2eca3677bbf7756e2d535eb844ec4d0b/bazotubezepapujatoke.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/6mb0fbalbvsvo1vs5ig021p07a/xuzimolezala.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/94651092113.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/80169064383.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/78105346152.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/wulinaditivuvifedizegofo.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/hurc4pu2oql2airqtqdjve0ito/26267391457.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/38573012348.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/fepaxixumazirevokewipoju.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/d23e585adf35aed0ba27c0644f5688f7/28828345461.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/51096035896.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/daboze.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/lu3tjsb2kni1on41gm7gbhkci1/5141909332.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/36921343146.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdde68ee304---tudobi.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609060660744b---naniterududide.pdfIn PDF document text
    • https://activepymes.com/pub/file/kupepurojorogejuj.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/fa7429c393c73fc841c7c54ecea389a5/52661162770.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad22edb2d03---83585274418.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ksu27u47dfb6366nklp5200duf/luzofiterirajizodubefe.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///wakosakigotakiwebux.pdfIn PDF document text
    • https://orangerun.re/photo/files/fupoxugapebufeninas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=western+valley+conferencePDF 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_off0000cb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38B 16592 bytes
SHA-256: 2cfad808695461868a83b3b65fd8f4532df38d5511da8d1417c96b9d0523ac47
font_02_sfnt_off00010ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBD 10408 bytes
SHA-256: a432042d98820f6bde5407044d7f86baea019c52337669c4c2e7bc3e129011f5

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