Malicious PDF — malware analysis report

Static analysis result for SHA-256 3396ae0d19f4ae9b…

MALICIOUS

PDF

91.5 KB Created: 2021-08-09 06:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ce13cad613c16f46d3645fb42429c269 SHA-1: c95b6682e82b55702015e0ed570a499042148c18 SHA-256: 3396ae0d19f4ae9bd884a2447d0f94d7c84b11c66523fe290d3eede09828fbbf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress installations and other disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a9332fd008d---gilevufepibutabo.pdf In PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/20272367756.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/58c70fd68009874d93ce0124a9859755/26698124214.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608057aec03cb---77391714401.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/mekesawepagegaditego.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/70057424293.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925cdfc7c33---bafel.pdfIn PDF document text
    • http://microlana.com/ckfinder/userfiles/files/90046169447.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/pinafunopibavavodumipa.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/lolizabujeweberib.pdfIn PDF document text
    • http://abnicum.ru/files/file/fijulugoju.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/sonojen.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/5cf034893e310817320bafe998db912e/moweginupedivude.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/0acscprnkk1f9ka4590bn9ki50/vuziwuvivikados.pdfIn PDF document text
    • http://storemisr.com/uploads/files/85642868036.pdfIn PDF document text
    • http://adice-area.com/pictures/files/63949717307.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3a27c3ba9ab864c7a8685f337a2a5ff9/81296525136.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/r3i6jv2aupjed1vk6k61j1o663/19523100653.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/68604070633.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f35714b7148---26345039550.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/buvunakivinereposuwazakul.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/piziwe.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/c7991b00db2d7e1b2acbb93782ed9475/47350760721.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/82966401217.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/73389889193.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+care+for+chameleon+eggsPDF 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_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 16464 bytes
SHA-256: eb20b397fdf7268e1640681e163da84ea665c2532346229f478c282527e2bfde
font_01_sfnt_off00012dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBA 10768 bytes
SHA-256: 3a565b2438cec793a7b7621314c3d6dfa1d754798b28a1560843911e993fa097
font_02_sfnt_off00014666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1