Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da8d3338fa18398…

MALICIOUS

PDF

41.5 KB Created: 2020-04-07 23:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 22f247216d99b995b53b914b3966a0dc SHA-1: f5c8cc7e27a624e634c0ff1446a9ca1745b07449 SHA-256: 7da8d3338fa183982092604a11d88ba1432668c2cf29ee90773b87581d16b694
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a method to distribute malicious content indirectly. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://francesca-ferrante.com/uploads/1/3/0/4/130488732/130488732.html#projeto+scfv+para+idosos
    • http://wendyguindi.com/uploads/1/3/0/5/130539818/348d9.pdf
    • http://happyhomeenterprise.com/uploads/1/3/1/3/131380031/waludur.pdf
    • http://hearthealthpsa.com/uploads/1/3/0/5/130546183/955b0b9a4a1fc.pdf
    • http://ggconsulting.care/uploads/1/3/0/3/130379757/jipibusofanawujigolo.pdf
    • http://cgpservicesfinanciers.ca/uploads/1/3/0/5/130589320/3a4ec70539ebc57.pdf
    • http://caratravel.com/uploads/1/3/0/7/130776374/luwivagidusudem_pojadovovikakez_vomep.pdf
    • http://gregpoirier.info/uploads/1/3/0/5/130588810/122777.pdf
    • http://bacer.us/uploads/1/3/0/4/130479123/3ee2cebe.pdf
    • http://lotharm�ller.de/uploads/1/3/1/4/131453007/16d962.pdf
    • http://infomorocco.com/uploads/1/3/1/4/131437864/bebazafixumok-bumojakowuruzox-jezawidetifitap.pdf
    • http://joulukortit.net/uploads/1/3/0/7/130738541/kaguxizamilal_nupimozesoxen.pdf
    • http://xn--lotharmller-zhb.de/uploads/1/3/1/4/131453007/16d962.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_off0000744f.bin
f456721fb565481b33f63770d7b71e3c53cf874b48027975d1533936699b03bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744F 10820 bytes

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