Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa923cbf75205be…

MALICIOUS

PDF

54.6 KB Created: 2020-04-14 12:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 91f619763431a8cf53b38df2d5dc714d SHA-1: d9c64689e0b00b1c77e956ebc42884038ca3a4cd SHA-256: 6aa923cbf75205be0fdb8ed14b7a81037d5f96d17acdac870cf73310418129ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, suggesting it is part of an SEO spam or link farm operation. The document body, though heavily obfuscated, contains a URL that points to a page with information about Niagara Falls, Canada, likely a lure. The presence of multiple external PDF links and the ML classifier's high confidence score indicate 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://theclassyandjazzyboutique.com/uploads/1/3/0/4/130476506/130476506.html#informacion+de+las+cataratas+del+niagara+canada PDF link annotation
    • http://redoakconsultantsllc.com/uploads/1/3/0/6/130620454/9e7f0deb398da0.pdfIn PDF document text
    • http://narberthchurch.com/uploads/1/3/0/3/130379061/8cec83a70f59.pdfIn PDF document text
    • http://sawcounselingcenter.com/uploads/1/3/1/4/131453213/7707984.pdfIn PDF document text
    • http://the-bird-hub.com/uploads/1/3/0/9/130969439/miwodenidorisim_balexarefofap_wufal_zonadusav.pdfIn PDF document text
    • http://togetherplus.org/uploads/1/3/0/5/130544295/tojijep.pdfIn PDF document text
    • http://videoprofesionalcr.com/uploads/1/3/0/6/130604113/200b6ed.pdfIn PDF document text
    • http://skylineelectricalmn.com/uploads/1/3/0/6/130605335/xamiponofala.pdfIn PDF document text
    • http://rosarysauce.com/uploads/1/3/0/6/130621709/5976276.pdfIn PDF document text
    • http://legendzofocala.com/uploads/1/3/1/3/131379824/zofet_dalumumodosol.pdfIn PDF document text
    • http://benchmarkrealestatebrokers.com/uploads/1/3/0/6/130604205/f338e01b8.pdfIn PDF document text
    • http://freedomtogethercic.org/uploads/1/3/0/6/130621179/wesaremilivepa.pdfIn PDF document text
    • http://ufo-studies.com/uploads/1/3/1/6/131637876/7239427.pdfIn PDF document text
    • http://wondersmackphotography.com/uploads/1/3/0/4/130488691/3f233ba920b6.pdfIn PDF document text
    • http://industrialownersforum.com/uploads/1/3/0/9/130969501/d2206c104ff83.pdfIn PDF document text
    • http://havenlyfarmtx.com/uploads/1/3/0/2/130288380/fekupusalozidilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 9840 bytes
SHA-256: 9dc7b29e741a72743601168f3462c231189101a3f334b61da320f9061ecf8875
font_01_sfnt_off0000af0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0A 2648 bytes
SHA-256: 2c32c498f23db3cae400dac070c72b38d41a5d5dbe5041cbe08e7cee44e1acfd
font_02_sfnt_off0000b859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB859 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63