Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f41df9c917f405…

MALICIOUS

PDF

83.0 KB Created: 2021-09-02 10:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aaf8624ac97e9ce1c2f8046d130ff527 SHA-1: dbbc15439f33604ffa28c20d728ed937f30c369e SHA-256: 70f41df9c917f4054c8bb93c0b2142a88feb42fbf766133437350630935abf91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting a link farm designed to host malicious content or redirect users. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://parkhigh65.com/clients/4970/File/fezemalanesuneraxotakova.pdf In PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccc53cbfef---60692803613.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/lujetabezotoxenovofi.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160825d4a377d3---51970675785.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160e52377f0c48---lesofobomerepeseranu.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/5e6e9cbfc5b84480831431be4a67807a/63841964481.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf2f5e594---57427924199.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/e12f538b05cb35a6b985ed52631b3277/patemoko.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/45076201138.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/gavevevudilegetupemi.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770f401b3ff---zamezututonipemevowapora.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608484d67eb3f---fonikatur.pdfIn PDF document text
    • http://korytnica.net/data/files/gevorozijufagalolajafajiv.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/fixaxebogino.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/miwelojafibabaxix.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860eb2697af---savudir.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/97131319948.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/c74ce3a868faf8a411b4ad493ce59e25/pogagiduz.pdfIn PDF document text
    • http://furniture83.com/upload/files/60034596763.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612776255dee8---difosopiledunubapusagad.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/vetofibozax.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/c84c4b8c94049eb95ed9461a0d99ace5/7306815731.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/00dpri1igibgn66a7h0qtg6jbp/dokaketuviwosodav.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/43594434487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=archives+of+phytopathology+and+plant+protectionPDF 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_off0000db92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 18616 bytes
SHA-256: 445885e277bc1d07c8facba00cd7d6da28031ad719f56f7b7d4abb19a0b91c28
font_01_sfnt_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 11060 bytes
SHA-256: e6388fafc3fd7a665d1881d9295c3b2ae9c4e4311e561b24bb0b377b54428db6
font_02_sfnt_off000125c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1