Malicious PDF — malware analysis report

Static analysis result for SHA-256 299e0e4a03c9cea9…

MALICIOUS

PDF

87.6 KB Created: 2021-08-09 02:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ec99dc08ba3b5ce75043113f94f0285c SHA-1: c12be0c8926462610cc4c20fcd89401112565837 SHA-256: 299e0e4a03c9cea99621b7636532d5b940701b3a4d4f6347434167de22ee4e3a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites that host further PDF files. This pattern is commonly used for phishing or to distribute additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/de3a2dfc9c3bcd57811186ee50d3c0e7/ragixolerijubofumutofu.pdf In PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/3759377758.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/16106607312.pdfIn PDF document text
    • http://4bx.pl/public/file/51211134509.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/regexapokupa.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/29129358654.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/72459003824.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/90f68d878d4759faef8740251054163c/29767253386.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160ce664248a25---24595548482.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/goperunu.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/46410911806.pdfIn PDF document text
    • https://amblamy.ee/upload/file/77666485240.pdfIn PDF document text
    • http://vizcsap.hu/files/file/xipisekev.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/gosefoxiropenefakalilam.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/vuparalumevufebedosiguv.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/74uotm3j5o2imhif5qurfo6lf4/gifatixokepuwusoludopav.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/70127073546.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/fotoz.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/77852794686.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d11110ef8---26478206581.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/sakilos.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00e6b693d---vawijukipozorovi.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/18557894772.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/8e544da5a72f2ab4ec135606e97a97c6/94665395130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=what+are+the+beliefs+of+freemasonryPDF 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_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 17096 bytes
SHA-256: 68f1b6ebf942af88ff1238df8a6d67a39eadb19652a2789bda5afa326f323ecc
font_01_sfnt_off00012017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001382e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382E 10724 bytes
SHA-256: a42e4c35a6281e359cf88b7f54df5efca1707231451981a56fa5d7fadeb2eec4

Open this report in the interactive analyzer, or submit your own file for analysis.