Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ab46e80c6ca064…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 17:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4c0eb913eae1c157a860fa4d3d0642d7 SHA-1: bb782583daa99cd0ec7b3c97cf6b0b0112495a1a SHA-256: 17ab46e80c6ca06478af974f4786270b4bee90b0eedd75d60aa952b826cd0e97
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure itself is also noted as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://caramelitos.sk/files/wutoliwugoxazivebat.pdf In PDF document text
    • http://cipetbhopal.com/webimg/files/45758624547.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/zovodixewitoke.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b79e9a5c2---jopuma.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/2959535680.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/jekodinakojakaposut.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/43317386869.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfff85a80---raneg.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/nirobanevamitawefizorifa.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160813bc77cdd9---vomeginuwatodoluliduva.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/polalapizuw.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d88813a21e---3793052811.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021070221061170554.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/rabezadopuwo.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/49h2c0qcfu37p02vi1tke6pum2/85047473723.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c50517df1---metisijix.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/28155951976.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/tipavivifan.pdfIn PDF document text
    • http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/veputizemojoxuxilovoro.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/zunodedibetotazazunasol.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/80051566959.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce19e04fda---tesazof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=destination+b1+b2+pdf+free+downloadPDF 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_off0000be78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE78 10888 bytes
SHA-256: 7dc651930b0af2d8a5b8be33523b1b7eb8cba0a835188eeda42181ee380c6bb7
font_01_sfnt_off0000d7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 19468 bytes
SHA-256: e8e1042f30c2764721311420650075ab40d20e4e1e91a41543d7dae113c91025

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