Malicious PDF — malware analysis report

Static analysis result for SHA-256 d292333312085fae…

MALICIOUS

PDF

201.2 KB Created: 2021-07-14 01:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 81937bc3273bd60098cb59b54043d661 SHA-1: 3bf041c30cdab5faa48c4d977fcf776de8686d5a SHA-256: d292333312085faec8383e49e97f9efb76b8ad9ea5b30b5547ba8bc90cd3a4dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/c55d2a0c6dc63ae8fa1ac9acb84bbf4d/notarakexeleg.pdf In PDF document text
    • http://progetec.org/userfiles/files/3789647968.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/37073735754.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7036425596---jijuferawurikorasamalu.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f203689d76f19d19a0c5d582a5bfa7d7/9807537960.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e379f5f97e---diwavakikuguvoremuke.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/63869618133.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/e71273050e168a01b27c52e1917b8f56/nuwufupenok.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/3bno2v97mlitsb4pokqqaf6rfj/598080365.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/zeridiviwarukumonu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51ed879100---tonafagotejejerimopen.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/noxazaguvupebitis.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95d77aa68---87295565757.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd66c208c4---zoberudomuwu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a8e10ea2---vuvefab.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/78170445843.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/247248a968e0f9a4588662578118b0c5/pajubisitakeduzov.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/udb1c9a9n69dudt6ge0f3p5n56/58445050460.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/nisuxefimutoguxewipunugol.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/31948331157.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/fawerumetigoxiduxu.pdfIn PDF document text
    • https://teyadegitimvideo.com/calisma2/files/uploads/39582928549.pdfIn PDF document text
    • http://immopolignano.lu/images/13116024190.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e0d37d8f94798965db642946a1958d08/76697985260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=after+we+collided+for+free+onlinePDF 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_off0002baf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAF9 16544 bytes
SHA-256: b740b1df4b9613a2c05738324d9059e4142e5e0c1bb0ba7a9d5bb79d70405e2c
font_01_sfnt_off0002e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C3 10208 bytes
SHA-256: 06b806b7485f49eb5c202617e1cb5d672947b1751632025646f64640cff0c327
font_02_sfnt_off0002fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1