Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb48d07777fc344…

MALICIOUS

PDF

87.3 KB Created: 2021-09-06 11:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 81931a2aa654b348ad4449f8e02b50d9 SHA-1: 70cf404db3c91a3b7847f5918e86efdea841cf2c SHA-256: feb48d07777fc34414a8fa6065376e0963d091e55a46af0ce4eb645d0bb0842e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious content, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL findings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b42390a0eb2---sawomajidabupelavu.pdf In PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b096389981cef14dfae0400ac2ef7504/8323332189.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095749a17725---25512633312.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/tumuwasurasidenulevi.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/dbdf6d1a6595e5ffdc1c5515090f0f80/12813571446.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210723_4E017CE45153625A.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/76776519453.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a0d208d47---22407893771.pdfIn PDF document text
    • http://mutitar.com/user_img/files/xiwotejibumebi.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/k5nin0643lj71s15ebtgvea8vc/25633457002.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca50760a3c---vowemodevel.pdfIn PDF document text
    • https://elemonbg.com/Files/File/pasigaweluwuru.pdfIn PDF document text
    • http://charivne.info/images/file/17645727538.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///46537689557.pdfIn PDF document text
    • https://icbacademy.com/upload/files/70470684726.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/85ab1e3219f123ec45489261539c115c/rirusixab.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/7620758945.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/megakatetisakibix.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/nunufesunonofetajisixed.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/75215282894.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/9d03d8ca4aa0fc8de461c08ea9ea08fe/tunowagom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=breast+pump+electric+or+manualPDF 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_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 17504 bytes
SHA-256: 6f7af6c9e78a06dc943bf401580bd5bcc49c0b88712df146dd17e6f8fc245707
font_01_sfnt_off00011f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001375b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375B 10688 bytes
SHA-256: 7495e8c06b50da799f7d0fbb223f8814fc36278fd15499bf82a3f194e93853f3

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