Malicious PDF — malware analysis report

Static analysis result for SHA-256 008706b5d76c472b…

MALICIOUS

PDF

87.9 KB Created: 2021-08-03 03:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 66ba1b6d9bf4b6385d45cde875ce5690 SHA-1: be01060537b2962f78dbd9c498c2c04d22757696 SHA-256: 008706b5d76c472b6e13d91617de0c4c6ff7a6c3b132d30a4b6732ebfa8c8297
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm pointing to compromised WordPress uploads and disposable hosting, likely for phishing or malware distribution. The presence of a 'download' call-to-action, combined with the ML classifier and ClamAV detection, strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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 https://crysiq.ru/uplcv?utm_term=download+ardaas+karaan+%282019%29+punjabi+movie+480p+720p+%E2%80%93+filmygod PDF link annotation
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/79f2029d780f21590ae8db955fbfab4f/sobopefasevopiraxib.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b445d17492---34740065513.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/267a1f3e939e7fc2ba762dcacbe70736/gurimojizora.pdfIn PDF document text
    • http://innotack.com/userfiles/files/diradapabusum.pdfIn PDF document text
    • http://muslimofwestbengal.com/mwb/editor_upload/files/98041239167.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/24335620689.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/cip89st96d1bkh2t2rrn8r56l4/tafowe.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/jibezo.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/d366a50e987e4d834febf48559d8d9bc/gobifor.pdfIn PDF document text
    • https://jagominum.com/contents//files/905463305.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/togegekudevivuwesuxed.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cac1dfef517---84064428358.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/27f6a384deafb6dc3cabf447b81efb2b/tabujadubafepo.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f77c376c1a6809de7ede55a5761eb084/bobizalimifixipadomogap.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/wivomadig.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5b0ebc248717724e9c8cb17523364b8b/duporanumevi.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/24276963740.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/jakotibidawomutadoli.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/sudinupenuwig.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed41c2baec---38621781122.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/befanibovivesekoro.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/6369128137.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 17132 bytes
SHA-256: 9d60fadf8da0e4aedca18add7445fb2f7c5921a57bbc0ff5db6c9db085fae601
font_01_sfnt_off00011859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13070 12456 bytes
SHA-256: e1e95940f1ee119f44d748bbfa152a1158cb43076495310b6b3f8512997e7a84

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