Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc88d2a039db080c…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 04:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5999c36944cdf577dcf4235ba1d83ed7 SHA-1: 25e9662a0692c55142535942e123a836ffedc1c2 SHA-256: dc88d2a039db080cc590394c63d119bf031a2645f51fafe9ba0ae6abf63c7009
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm, with many URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/utd4uh374sj33riqb52jl7v81p/72369294415.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/vusajuvexigodi.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efea8b7bbbf---nobupexesuzexuwamepo.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/66499852339.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/eh6jnaq4sadcapf60fau5l1gre/57729649727.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/fikipinuveneberuvo.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///32009800844.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/85509364179.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/mivavekixitumuxuk.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/84186943863.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/21351891850.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/84172ec476bfbf68e35cccfb50c9260d/tuvagavuwukuvumikuv.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160821cdea8a09---puposepazegidukelixut.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/11105437269.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/29pi8d3bsma6gsujtpbe5dlqns/42576821519.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/7efdd39398f4a98a1f24977ea7f9fb59/lejijibipiwagogonasino.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/21815451125.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719c4ce7802---48007039757.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/28157227677.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/62887071172.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102f48ae51c3---21294893067.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814cd01eccf---fosezoxawenodasovun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ambarella+a12+pdfPDF 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_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 10372 bytes
SHA-256: 2e8dbb5f227c2f01990481cf64c6300ae7a64aa828a655e5ceca3a5276bac0ca
font_02_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 19420 bytes
SHA-256: 13cf6c6e2664e3b218fc5d7f9ed0c93d4d5d8a689285f169a5e35556adc59baa

Open this report in the interactive analyzer, or submit your own file for analysis.