Malicious PDF — malware analysis report

Static analysis result for SHA-256 2950b74af45e0a4d…

MALICIOUS

PDF

37.4 KB Created: 2020-06-14 13:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1a3442cbce58237801d50bd7eb4f21 SHA-1: 4cdd60918592d58556c97d3fac886ccd769db56a SHA-256: 2950b74af45e0a4d392dc37de969bbbfc3d505cea59e8c9fc053ca74d5210e54
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of external links, many of which are dynamically generated and hosted on suspicious domains, indicating a potential link farm or distribution mechanism. The document body contains text related to 'project on supply chain management pdf' and is generated by wkhtmltopdf, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ourcreativejourneys.com/uploads/1/3/0/5/130539188/130539188.html#project+on+supply+chain+management+pdf
    • http://sledgeonline.com/uploads/1/3/0/5/130545565/bapefi-tusevix-meboxogizovik.pdf
    • http://webdisk.groundedmatters.com/uploads/1/3/0/5/130542822/tajizud-pujaxedilupopig-suwiwifegukatik.pdf
    • http://ss-developments.com/uploads/1/3/1/8/131856554/judunulevexutevabux.pdf
    • http://cupofcoffeemarketing.net/uploads/1/3/1/1/131164048/105f5fa6ca.pdf
    • http://mcclureandsonsconstructionllc.com/uploads/1/3/1/6/131606745/xidoxanakari.pdf
    • https://winanufejo.files.wordpress.com/2020/06/94397387819.pdf
    • https://xulesik.files.wordpress.com/2020/06/luvojetusogum.pdf
    • https://zadejexidaba.files.wordpress.com/2020/06/daxazutosujidujadifopum.pdf
    • https://kemekakusava.files.wordpress.com/2020/06/68981449012.pdf
    • https://lanotojuvon.files.wordpress.com/2020/06/49121951523.pdf
    • https://wefozeb.files.wordpress.com/2020/06/49345652914.pdf
    • https://levarip.files.wordpress.com/2020/06/lutakudewetawuvi.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_off0000690f.bin
8eb30d0d62a143b03be96ea5064f678ac3c138988107878b4112468b7a912e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690F 9812 bytes

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