Malicious PDF — malware analysis report

Static analysis result for SHA-256 d489a9c302607b9b…

MALICIOUS

PDF

91.5 KB Created: 2021-07-22 22:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7041781d8d130f84fe1cd22f898ba46c SHA-1: 378d44f045c1c6b3f7848e6d0390309ad329f3c0 SHA-256: d489a9c302607b9b9b51f29b51c409d7db39a4001fc029831b5471f81204df0d
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised domains suggests a broad campaign targeting users through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fonixkoncert.hu/upload/file/27187809431.pdf In PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/hoe73l8rfpi8ms2ku8attkvf7e/xofekelojubuxivu.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a115a2186cf---wizijivuto.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160885da6ec1c8---93184285424.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/92093021879.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/bfe1e7bda693a85f50fbdc50aa94fb05/semupoluwebeluvowirek.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608254fbd01d0---860552867.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/tejotagomidomitozonifov.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/jufejonufopetofidor.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fcaaaa5be58f0e92e4209b824ee46ef3/75119679796.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/16e945ccfbeafa8817febda65aee4f96/ruxeteganefipigonasesa.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/47186999379.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/luduz.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/53680239870.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096dcfe2122a---muwemanixebapavalajugakal.pdfIn PDF document text
    • http://russia-ex.com/64180761005.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/cbedd5708dc06c7d12d28a592838bf2f/28206583861.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/l06rqsdam5ddrp3tnnd5b74k4c/92952583450.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b9293a2700daf5b7729a93a913b65e51/dusaliguvegog.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/n7rgdvblnkvemllkfq11bot7v7/zogudor.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b0467691562dfa8c6b9164e1ac949e64/17607921527.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160afd51130e1b---30623773557.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/92262615891.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f94b61a08---82256784311.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ks2jsha9e9h468p0m2u8lr0b87/gerexixakifatikijutokubi.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/rd9dsj6a28emj58p44adje1t12/51475947263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pray+for+the+wicked+reviewPDF 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_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 16384 bytes
SHA-256: 24c1ab8693f44ffec08552e85b22ea316f0658893e1669220e9c1691724d84cf
font_01_sfnt_off00012d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8F 10612 bytes
SHA-256: 65a744a53a203e6194487ff3a6e6d9c23f2d0cc57b295ef270265a91cd9e2702
font_02_sfnt_off00014615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14615 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1