Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec17924007d5522f…

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 02:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9bdb9c423557b4b8ed7ca066690c0439 SHA-1: d056c9c49702ad762adef59bc2939a4d6e276558 SHA-256: ec17924007d5522f4b22841c8b5f2cfa44538773a5e669a2341bd640692bdf07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to domains identified as compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://engroupe.ca/aym_image/files/folivapekukonufavizok.pdf In PDF document text
    • https://ferdavagnar.is/images/fck/file/55608604042.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4271ef47f---83135718620.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/nutajaxewe.pdfIn PDF document text
    • http://centronegozi.com/public/selisotomozapojiv.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/28218829450.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610315b060706---69867534020.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/47660231267.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/96546786145.pdfIn PDF document text
    • http://canadanur.com/resimler/files/wovaro.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/26136679025.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/63392917266.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/jufun.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/gokusuzub.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/tovefefugamijuxisane.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/26520854122.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/7228570465.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//vexirek.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/79251225452.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/1de22ed0a70ccdc3e185cb70300116a9/kebujixi.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/49598655176.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/7f0bdsoo70e7e134ibv1ptaeko/pupoxuradufuxadikimaluwag.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/majozi.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073686bbf135---nigutet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+write+data+analysis+in+research+pdfPDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/2006738830.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_off0000ddb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 17744 bytes
SHA-256: d249139a9f251a3df0977a8b25ca717f6b0d8723e1d4a4bd598efa4101621707
font_02_sfnt_off0001231b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231B 10908 bytes
SHA-256: b932da2a646d8a67c2593c3a4bc59b8bc50f1ac02085c4481da5ea391ac544a8

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