Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc6b8db63bc0a84…

MALICIOUS

PDF

87.0 KB Created: 2021-07-22 02:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 885d4a2a29488d585b0b913e1cf0f2a0 SHA-1: a675391897068daba1aade3a07238c98f00d56e6 SHA-256: ffc6b8db63bc0a84ca78e8529d90443cfe5e9c6a5e94dc7213e040116c65f55c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised websites. The presence of multiple links on disposable hosting suggests an attempt to distribute malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/10939800028.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/kj8q0nqcpn3rgj2tigosq2a4n7/52094685188.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d98cfad5e5---50020805096.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/binumidi.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210616_180630.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/1e00e3e76cacb70f0e6c23528c11fb99/40290965594.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607162d1cec96---90880719936.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/88963430621.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/tojekudikexab.pdfIn PDF document text
    • http://artside.org/data/temp/file/metanoneduvuxa.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/junevubive.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304720b6dd---85452743967.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/71936613562.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/pabamedivajalokeg.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608249c9e70b2---15301794462.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/cdc8c84d2c939688279d41455907613c/56170510657.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/87962180285.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16084899951952---jetamutevaxulalisobolupu.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/46313181321.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/rafifofaratavaronitaf.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1d3ed4223---76120547355.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/detirojepu.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/9aa1fb54ba96115010dc257316284b88/lovovotejasabiponir.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9e216fd879213df8bff53a337b5bd85c/5641417403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=good+morning+in+swahiliPDF 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_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 16932 bytes
SHA-256: eac49b61cf4c5b001445f71327b75dcafbf65625ee4c147dfb752c98a291cf73
font_01_sfnt_off00011ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCC 10588 bytes
SHA-256: f205abd28aa763dff98132dbcae5f550743ef2a0261f497aa766c3654a44f006
font_02_sfnt_off0001348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1