Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d9afe3e576a68b…

MALICIOUS

PDF

89.3 KB Created: 2021-07-31 22:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b891e8c7f4955e48d3021054539f0367 SHA-1: aa5fdf37091f01827cb9672206007a56fe454f1f SHA-256: 12d9afe3e576a68b3d9b65c3b0b47506dc01790553fc6ab2130c3e23e329dbc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised websites, suggesting it's designed to redirect users to malicious content or phishing sites. The presence of numerous unknown URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/76c21a5aeb555b9adc84c779a5ab2932/dafalumelakizexeligo.pdf In PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c94fcc66200---fifikefepufupifafegaz.pdfIn PDF document text
    • http://gibisch.org/files/files/kolovevesozebularewivu.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9981dd667---39260181039.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/sukopedirif.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/7ca252420a179e60163b2af6c99a3730/sunexalarisemesunulok.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/02198a8c2c3fa282594677dba2b70bfe/80034464339.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/71937071855.pdfIn PDF document text
    • http://jngf.cn/files/file/benosepusafodef.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4626b9f817---54133820115.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160832b61614de---1856729462.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/manatimijigazezitudita.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/28340036276.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/sujam.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/65df7aa37f5b907d4605bb40fdd145dc/sifolozuwemasutozaraz.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/1879a59e6313ed5fc059a9d71706b0cd/68123049334.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c7128bc2c---89237336306.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/41143416808.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9352f538---80663208349.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/83t24d2vi97t0nm3bqcgu4beg7/94620728643.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/52608065784.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/7e0828ce03c94e0f5ef82146842ad820/duvesovefipijapefemezuso.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/72381621550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+connect+dymo+labelwriter+4xl+to+shopifyPDF 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_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 17304 bytes
SHA-256: 9f7dc9772bb2733d8fb92a86f5b4a622ae9451f5a07e6ba5a3a451f10cb4f7a1
font_02_sfnt_off00013bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF8 11396 bytes
SHA-256: 409ab856f758d6f9b03706ea4e15f23428f4f3d81033668945d04b29d2ad276c

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