Malicious PDF — malware analysis report

Static analysis result for SHA-256 6967f9bb5fe50a6a…

MALICIOUS

PDF

111.8 KB Created: 2021-07-04 07:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c34ecb299d91adac39012cdd8fb05d66 SHA-1: b5fb4216c571399dc693999a465b567f41221b0f SHA-256: 6967f9bb5fe50a6adbe97daf5239291904d37e42ba30a6cb72d3de97458a5c48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The primary attack vector appears to be directing users to these compromised sites, which likely host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b32954398---86571796487.pdf In PDF document text
    • http://ebslang.net/_UploadFile/Images/file/tumiwixoloxovibisi.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/rk91k613p6jattkc3u3d5t4f6r/gakagaruvenokixejotuv.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/toxutelagatoxuk.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089ae2049784---zisonijikobuxowaba.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5634d4056---nelubivuda.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/zowalonugij.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e163132fa7d445888fcfb03d1a995d16/tubunetusurulokoguxut.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/jukivebezetizik.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2ec8ec396---zifasinevewofeweru.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608012b46a463---17804587198.pdfIn PDF document text
    • http://jp-cable.com/d/files/gakebeliso.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/3137660809.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/fepuvuseruketoxujagimo.pdfIn PDF document text
    • http://siembra.me/uploads/files/91702554322.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d94d205d88---kitegiritox.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7de853d33---96953850565.pdfIn PDF document text
    • https://mytopics.it/uploads/file/kavufegidowogibugene.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/xuvimimaba.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607916211cb5c---12095313167.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945c49428c4---fepigu.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b8005597b6299f175d5a9a091733a360/jerumajoxonegurodexig.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/51730834860.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/905f558c93c51916f4aa08ec5de19a5b/49201197764.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ifug8nf34hdpri42qhgtbmq1ar/latufigesenipetiwixol.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/468dc6d7a7d8b16365faa865d77d1c01/35955685583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sternum+pressing+on+heartPDF 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_off00014f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F15 19788 bytes
SHA-256: b3d50d7cb617c20c017baf61cf517177d65b5a1dbd04f826ef562ca7ba788384
font_01_sfnt_off000180c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000198da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198DA 10828 bytes
SHA-256: 4ebbb841844b40000d1e9504a36afa64b77ce837cc742c96d299d59648befbea