Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ae52940fd647c4…

MALICIOUS

PDF

92.2 KB Created: 2021-07-16 16:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7b2b6a365b7422b6885e48ec0fadae56 SHA-1: 05b9b68b29652c2b800d700dbff08f04cbc5ce21 SHA-256: 30ae52940fd647c4e43206456a183842af91cd85213da2bfcf7487840dbaf57b
156 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 external URLs, many of which point to compromised CMS upload directories, suggesting a link farm used for distributing malicious content or phishing. The presence of external URIs and the nature of the URLs indicate an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://nomylo.ru/uplcv?utm_term=black+type+broodmares+for+sale PDF link annotation
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160abf7f7a2e45---35912651283.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaca972dcf---gufetazajidan.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/58f8437ca9d476817eaef04049371e2a/mevekefafoxujupuvunadivo.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/01e955f9a96b72b112b73994c7a1b816/wojitetiwimufakuzereduji.pdfIn PDF document text
    • http://live-net.it/file/1672845609.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/nakipuwovuxux.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/9b7563ff14fb87a181a15bbdd0c6c299/lewaxi.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/31990295181.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/72103772646.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb70e89a00---rawisina.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202107071227555266.pdfIn PDF document text
    • http://ccadl.com/files/20210706051430.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/3c4535d6d18124b607699da71a52c4e9/14854958547.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/18643517704.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/50080013160.pdfIn PDF document text
    • http://fotossc.pl/_files/file/92420517353.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/o4itsh9fatl7fjeutpgreamrj3/bodilegiline.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/84516310108.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f749b49abf---49022033628.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160aaf6a97d7fd---duzumak.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f72c9873d---56093243330.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16089984266c50---77352165095.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a861d26cd---gexopikamozipaz.pdfIn PDF document text
    • https://menu2uplus.com/images/file/26321507418.pdfIn PDF document text
    • 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_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 10984 bytes
SHA-256: 790231782b19473a06edec565ce93ab738c5073b795fa2d1f1f01b2211198975
font_02_sfnt_off00013534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13534 17132 bytes
SHA-256: e6e933f05370992254356d45898f3bd55858fa5ff786650221f3f18489c094c9

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