Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b418d0e414724d…

MALICIOUS

PDF

81.9 KB Created: 2021-09-07 11:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d43ce2befcd7ce6b0337b103afe6f8db SHA-1: 19fdffcaf4b7bae28ffc7810ae11ecad25ee72b8 SHA-256: 27b418d0e414724d8af2863b750d6d7f38b2736a166aabbc9ec51194a72f453a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute phishing content or malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it is designed to lure users into clicking malicious links, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/7097ddfr55iigssqcbfht1s1k2/bakasumaz.pdf In PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sja76bllivg065p97ovisol07v/vonunikili.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/87b43edb84bbb298ea4425a2f9db9327/vulaliv.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/914f369daa4ade60171f2d18326e244e/50066389297.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/6678278812.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/15832998671.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/duzukukutidezinotolav.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/921891e79a388cb20d4ac1ad71910212/61185416773.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a7045e8a91e0b7cd0d89519139d8d270/41372550980.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/l037548209jdfotv1mjd29ilte/piwofisowo.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/73634670907.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/liwozakavusowif.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/95970448821.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/lodalisi.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/63347347845.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210830_6A15ED92D291675F.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/kibowotikorudova.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b06f2f83771---furezalezeruxisonuxon.pdfIn PDF document text
    • https://datawire.gr/files/files/39436700642.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/miruvobeb.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bef2cbcd---73473181565.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210728_1C52192157C80F62.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dermatitis+atopica+definicion+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_off0000da10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA10 10736 bytes
SHA-256: 3bec8746dc6ca15b039e7f2439ec5fe980fe4d2909331f263c3bfae776c6fbce
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 18148 bytes
SHA-256: ca1ac9bade5c434d6b20738d6d4dd300181e6fc0032432e8c8921b68d6dd6555
font_02_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.