Malicious PDF — malware analysis report

Static analysis result for SHA-256 119c2d0c32e1a8d1…

MALICIOUS

PDF

101.9 KB Created: 2021-07-20 21:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 24541333bdc4b245fe5fc29fdc6aa3cc SHA-1: f5291fa4f38ad0c910cc79a5a5163d44b4bd5504 SHA-256: 119c2d0c32e1a8d1de94df4998e991ea2d02406ab03a0e4ededc2b4ce15ff53a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://madopin.com/calisma2/files/uploads/luritojesedenevir.pdf In PDF document text
    • http://dkyangmei.com/uploadfile/file/2021070610035673499.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/45587514609.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d283748bf---sijifurawegixasulitera.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/46859901575.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c2fd7ce5b---dibitoparola.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kawanipoke.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609229a4a0279---wewigiv.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/f9ed9db9c8f97df200e5c9c57d9f1ec7/49668191525.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16086199b39b99---72970708643.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c0f26710fe02c0d3e1648398e7f779d1/befame.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/7966291843.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/puvabaragiside.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094247878577---mifobavefor.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/b0fcc763ce3aca25efa5d7f579325e12/44004420113.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f6cd3ae9d---37532711341.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8844a994bf---xizomewanodemufiveb.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/52ff05f2029a2b3d87bb903e9a59f5cc/49597731281.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/dbct50joav9p5j0iuevb7raro0/jopijiretiku.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/butobig.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/majugu.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/81677baf0262844df5d0e4c6fd73456f/merilepapizuzitebomolegot.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/27982387611.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=riddles+for+kids+without+answersPDF 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_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 10776 bytes
SHA-256: 64def6ca7b60b87a98c10ac39a9cf47ed80572da65ebc708f29c3269bcead780
font_01_sfnt_off000144f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F6 17264 bytes
SHA-256: e7a8ca581ce3ee817d60c9f37180e52466ef10f46f39c4a51eeb6064c293e820
font_02_sfnt_off00017217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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