Malicious PDF — malware analysis report

Static analysis result for SHA-256 958afa169986eb2d…

MALICIOUS

PDF

75.2 KB Created: 2021-07-18 23:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60953c81278e028479ff0f37aab7c5ea SHA-1: 963e9c8d86e9b4ae8e4e46b2ded6e9988a7accef SHA-256: 958afa169986eb2d755ee0ce25be309e193e7fa022d8ecc1240997ef0080ea2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing or to distribute further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/1b4821e98421847b155a77de6425948c/badazabazilisadi.pdf In PDF document text
    • http://www.bluewhaleline.com/image/upload/File/5806474134.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/8ca2352bb5f0038af5cf05dd5c1e809d/21100799197.pdfIn PDF document text
    • https://0900107678.com/upload/file/doxixinaworezivira.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/55552701182.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a91155caf27---semosudijejo.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/41693783736.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c1f136fe1---98288316958.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c5d3ed0b5cee0fa42f179051b77bd937/19689327074.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607838ecb44f8---tesagovetamomozor.pdfIn PDF document text
    • http://geodez.com/pliki/file/zizusilowelepujitokurepu.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/fesifezugutidimezebegisul.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e842ca9bd9---81100664840.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/jebuzojelutosiw.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c630f37c84---84453285498.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/83247526092.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/nufquchc5kqkuv0ib6p3cglir5/javubuzemufukaxo.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a69ad57828---kuvegiresezewesimavebis.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/28962477824.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/nijedus.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/nedoxesanenov.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/6ad2f152832fa69e3f68367f19be7a1f/65374490680.pdfIn PDF document text
    • http://goref.ru/files/file/54408719850.pdfIn PDF document text
    • https://cahayamimpi1.com/contents//files/85168231331.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=boylestad+introductory+circuit+analysis+12th+edition+solution+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_off0000c247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5E 11244 bytes
SHA-256: adc710ebbd6bbb310a64db5e49bef9cda8b1420d8e93dabf35c9001cacdebd83
font_02_sfnt_off0000f4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DC 16240 bytes
SHA-256: 4a83a45492bbf96284e684a8246fba4b44c34f1d3c67e9999ce460bd8cdd6712