Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec864aa5eb1b59e…

MALICIOUS

PDF

40.1 KB Created: 2020-04-10 08:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2ca307b81ba151447d884f61d6b2ed0c SHA-1: 777abdaf501e66ce1f85e06a02be866c161c7b11 SHA-256: fec864aa5eb1b59e0f0b3c9fe81ab27e977426bfbefa32c54aa2fee0dfa4efe2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links to other PDF files hosted on various domains, indicating a potential link farm or distribution network. The document body itself is largely garbled but contains a title related to positive psychology and references the wkhtmltopdf tool, suggesting it may be part of an SEO spam campaign or a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://djballallday.com/uploads/1/3/1/4/131407112/131407112.html#por+que+es+importante+la+psicologia+positiva
    • http://barkersmillchurchofchrist.com/uploads/1/3/1/4/131406569/buret.pdf
    • http://newmusicempire.com/uploads/1/3/0/5/130551090/9033619.pdf
    • http://josephineborg.com/uploads/1/3/0/7/130775529/128030.pdf
    • http://krystalskrafts.com/uploads/1/3/0/5/130543020/jonexikiso-tipopesivex.pdf
    • http://thejarspot.shop/uploads/1/3/1/0/131069879/6068582.pdf
    • http://discoveractaspire.net/uploads/1/3/1/4/131453493/sigoza.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_off0000712f.bin
e2f0c8386f00cea6db3dfb2213749313482ac73c54b462943bfe24e19a34be27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 9168 bytes

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