Malicious PDF — malware analysis report

Static analysis result for SHA-256 976e74c1875bd0ec…

MALICIOUS

PDF

82.3 KB Created: 2021-08-18 16:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f30373fdad1f6546bec7f438ec0985cb SHA-1: 74336de0d55b62bea80b4572484b550c3dc20048 SHA-256: 976e74c1875bd0ec56e5bd243c644988dfa06977bd425584e86fee25b283cfae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure and the ML classifier's high confidence score further support this assessment. Although no scripts were explicitly extracted, the nature of the links and the ClamAV detection indicate a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=download+naruto+ultimate+ninja+impact+psp+iso PDF link annotation
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2mbdgv227803kvgo9622kftqch/jubezubilumekomafajesemur.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/xenowesojagupaxoma.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/82263299103.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cefffb14092---30885947085.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/sft417447c1e16qfcsrkvo66dn/gezolibapalokexofufop.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/velajod.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609191f5ede65---kutebuvaruxawuxujo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e96ad9699---59958498374.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/1038885911.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc349c3e45---voziduxedupuwegomoxuloza.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/9802fed719986a3187e604bf07a69b08/86584405982.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/32264655821.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/xivadurud.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/2793c7pi6t2agjl8mgqirnqqfh/45865929209.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160853d2aa004c---75971109336.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/1867089277.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/totub.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/13216324428.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16111f1ff49c19---97785492056.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/gefamapim.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/e51gvell3mdro7e22ch6191886/55348970611.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1d1c1chqg42t4otdg00et5d8k5/zefurasaxasedexezewupab.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/19718782327.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/84986742534.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_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 16604 bytes
SHA-256: b031906aec7f55a28b39357cfe22e01db23ac4ecdeed97dd1c02aba4203d0dbb
font_01_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 10992 bytes
SHA-256: 575f2546ac8bec3cdc0ad2331ff46b3afe69875720b22d82b89196efcfa2a141
font_02_sfnt_off00012297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12297 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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