Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbcfea2a3d1c5f7…

MALICIOUS

PDF

35.6 KB Created: 2020-04-28 08:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fd4f731bac9ba55a09046c23171fa0cd SHA-1: b2d776c6015bb3fdd2d27315b81ddc9c14f81f10 SHA-256: 8cbcfea2a3d1c5f74f3608e5346c523053e29738769b6cb9901de1517aeb56d8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, a common tactic for SEO manipulation or distributing malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'Arm template for azure data factory' and embedded URLs, suggesting a lure to potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://djsacademy.com/uploads/1/3/1/8/131856554/131856554.html#arm+template+for+azure+data+factory
    • http://westportcommunitychurch.com/uploads/1/3/0/6/130604168/gapokudifug.pdf
    • http://imagesmarketingagency.com/uploads/1/3/0/2/130287898/1358861.pdf
    • http://hopeenterprisellc.org/uploads/1/3/0/7/130739068/pugagegeji.pdf
    • http://nthatuwaconstruction.net/uploads/1/3/1/3/131380988/bitokom.pdf
    • http://amokasolutions.com/uploads/1/3/0/2/130289295/lopasefe_mosusela_tuvetos_vuwigake.pdf
    • http://cheshirecounsellingandpsychotherapy.com/uploads/1/3/1/3/131398296/zizejew-bisuzodonowaso-bopalap.pdf
    • http://paseo.be/uploads/1/3/0/5/130588346/giresozora-pokar-sowusejopifit-tesofuk.pdf
    • http://marketsocket.com/uploads/1/3/0/7/130739495/672e02fe.pdf
    • http://autolifeinsurancegroup.com/uploads/1/3/0/2/130289597/bavowir_dujikun.pdf
    • http://candidateswillsoar.com/uploads/1/3/0/2/130289589/7d22cd.pdf
    • http://leap-of-faith.blog/uploads/1/3/1/3/131380128/lirovol_pateroraf_rosun.pdf
    • http://straleysolutions.com/uploads/1/3/0/6/130639776/1947229.pdf
    • http://lolas-hc.org/uploads/1/3/0/4/130483345/996583.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000609b.bin
bf7983eb9eed3937f17ed4d5f53edd5dfbba359bd8503b55483aa8c025b0c6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 8796 bytes

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