Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2af2902c162632…

MALICIOUS

PDF

88.9 KB Created: 2021-06-27 02:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fae73c43780a72ce4e12865a55436ea3 SHA-1: f00980117391b3ff34eb16d6eb3adc9cd4162652 SHA-256: 3d2af2902c1626320a31606ebe54e04e8ff6cc5c2b31d149b8b01820bebdd84f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or phish users through these compromised sites. The presence of multiple links and the use of compromised hosting indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://hotel-la-licorne.fr/userfiles/file/tifusapovijot.pdf In PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6f2d26ed8c9861954361520da29cec22/kosab.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/63941045894.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099f2ee83f2d---6918171143.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4a06ls4f255d24h7t3va8t85n1/soxenowoju.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/3432efd95f59e74ee26f887fd799080f/lasugomatadejupizomas.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021062304085873499.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/39463011686.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c540168f7f7---venogiranifitagemuxix.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/5785575c5880ad900bfb8faf01243295/xebikep.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/pufarujigimuturiledumu.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/77418199065.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a9832c589---vobaz.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/82bm7qingfiulopufdmgqgncn3/dafupuxelozudoxaline.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/tukavunefo.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2f00d1d2---vilumerer.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088089494622---97352576863.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/kezimalareliwovaz.pdfIn PDF document text
    • https://csn-alliance.com/data/files/49224083400.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/47875a6fcee219250b80e15627d895a3/36299038523.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2i1245pil4rr31kko0i33cssvf/9088806744.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2297e827196c2a964a1cb9ac0ddf146e/3323362059.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66c76b9eb1---7126389546.pdfIn PDF document text
    • https://clinicscrm.com/img/files/wexorodugu.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/91348781259.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5701a7e51---3633930095.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/pfjg4qiq1ulf0cne2gfqhlqplt/2788352343.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/015cbe102e128abd2d7d52cf9df7f352/litijoseb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=wedding+anniversary+wishes+for+my+brother+and+sister+in+lawPDF 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_off0000f9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A9 11200 bytes
SHA-256: 1ad73d268cf20260e7f981a8e63a3c1e6d7dfa9f6d554abdbd5aac064333fc56
font_01_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 16304 bytes
SHA-256: e6df4e73f1332e1363dc5827d15117cd4b0c2d0f1404fd0769953aa77eef9a49
font_02_sfnt_off00013d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1