Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab796df525a307e…

MALICIOUS

PDF

53.4 KB Created: 2020-06-15 19:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1bb547db5273af5f44a80d228f16114 SHA-1: 3c018f88eff311c92bd34227995cfd4a3ad4da59 SHA-256: 7ab796df525a307e04a94ebc31c09b6017caca169657083b94aeeea762d265e9
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a 'link farm' heuristic. The primary URL points to a document that appears to be a user manual, but the overall structure suggests a deceptive SEO or content-hosting scheme. While no scripts were explicitly extracted, the PDF structure and extensive linking are indicative of malicious intent, potentially to redirect users to phishing sites or malware downloads.

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://agenda4learning.org/uploads/1/3/1/4/131482821/131482821.html#ipod+80gb+user+manual
    • http://innovationoil.com/uploads/1/3/0/7/130739015/6385e0.pdf
    • http://vastgoedstyling-decoathome.com/uploads/1/3/0/3/130379192/padivojogidadabav.pdf
    • http://lindawilsonrealty.net/uploads/1/3/0/2/130273573/1468958.pdf
    • http://metaphorandmeaning.com/uploads/1/3/0/8/130874635/4746316.pdf
    • http://liquidfiles.mrazamerine.com/uploads/1/3/0/4/130478935/gufelosixuk.pdf
    • http://phoklandgov.com/uploads/1/3/1/6/131637116/vixisowe.pdf
    • http://draftbeersolutions.com/uploads/1/3/1/8/131871835/5830012.pdf
    • http://daytonacondosandhomes.com/uploads/1/3/1/4/131453907/cf2f799d90c29.pdf
    • http://kishkoinc.net/uploads/1/3/0/5/130588511/0402911f416.pdf
    • http://robertwright.us/uploads/1/3/0/9/130969568/tolasi-danisiset-zeranuzefu.pdf
    • http://hostmaster.lukeandharry.info/uploads/1/3/1/6/131637553/gadujoz_waterosegudituv_vumeja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a3ad.bin
2f3abb11e3a3ec8acce18b009aca532f78046d944d9524d9fc541640bf7bead5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AD 11356 bytes

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