Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb48eacf653a3b2…

MALICIOUS

PDF

87.6 KB Created: 2021-06-30 17:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4dcc8fb1e1ad93b3360717bec50b7429 SHA-1: 0184de935f79a0882e79128025cbdaaa71c2ff66 SHA-256: 7fb48eacf653a3b2d85d6eaf88f07b2511da8fe4fba8457793f854778609af74
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious document designed to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0c8dd2fe4---10137379651.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/dc82e63f19fcf526bb5ae074bdffd2d2/sijegutax.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1258937d3b---73014946665.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/fubuvobinu.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/70277398050.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/ledir.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160949d30481f0---14601470334.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca91ac727f---lanal.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/07b058faa7e2299d394b6d290eb8cf53/warabujisavinuzakorumap.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f9bc0b510196ed02fbf65e8375d63f40/69574541981.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/xitojijojufa.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b795cc88235---doxepipem.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/3r179g7gd3j0j9lffh9rptl2dh/vemolubex.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/t72v7mb2q6oiai2n23i1306af3bfv7pb/29626376533.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/xabete.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/xoramaputuxuriwasirarojud.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/1a47e0c03da7e4c29f32eab2a098d27d/28415605662.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/91ccaf0b22cc4f96b651b595e1a8d486/nonewilenozeba.pdfIn PDF document text
    • http://ipceurope.com/assets/file/roleka.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/29ec65bdb3fcfaa7cd374bb04c4eb719/kividawamakanowakab.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/vedasaputa.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e6cc52809---mutekubufinobogixapiroz.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/rffoaku0j8ji06ap37p9th3d4n/71984701091.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/5445995651.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/1vcevmc5o86mtjha2o73oldg3r/xojexofig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=fdr+mount+rushmorePDF 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_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 10288 bytes
SHA-256: 04e3a003f5e782b30d1070ff995ff306db27f11c6f18b23b38ac13abd0ad873b
font_02_sfnt_off00012451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 17332 bytes
SHA-256: 892948980b891075d9a912897ab4d7bd9cf10f839e6ac1d0293bd38ca6c70391