Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae5d4b6cd399a36…

MALICIOUS

PDF

36.1 KB Created: 2020-04-04 07:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2ed260d68c7989d143096a16d951f962 SHA-1: e94414cc63a548aa7e66d8e04a40013fbd7e44ba SHA-256: 5ae5d4b6cd399a36ef85a0598278c76c1315252ac54dd3c3c69239c64304e2bc
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a lure or a distribution point for further compromise.

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://jillottodesigns.com/uploads/1/3/1/4/131438532/131438532.html#genetics+monohybrid+crosses+worksheet+answers
    • http://graham-rothschild.com/uploads/1/3/0/4/130435772/17e0d5a51a.pdf
    • http://williamarthurbrown.com/uploads/1/3/1/4/131407283/2778275.pdf
    • http://project-27.net/uploads/1/3/0/3/130379051/komuw.pdf
    • http://recoletter.com/uploads/1/3/0/5/130590702/fenejol.pdf
    • http://abovetheclouds.guru/uploads/1/3/1/4/131483076/lososezaduxulugotove.pdf
    • http://innerevolutionproducts.com/uploads/1/3/0/6/130603932/fonebenowebutagi.pdf
    • http://lifeinbalancenw.com/uploads/1/3/0/9/130968962/e0bd99dd5d.pdf
    • http://eugenewindowclean.com/uploads/1/3/0/8/130873951/9e9f22aa5ecbb38.pdf
    • http://mjrichonline.com/uploads/1/3/0/6/130621394/3947713.pdf
    • http://the5thstop.com/uploads/1/3/0/5/130588657/4925793.pdf
    • http://kabase.ca/uploads/1/3/0/6/130603851/dabimuvo-siwalamukux.pdf
    • http://iddservices.org/uploads/1/3/1/0/131070805/talam.pdf
    • http://coolcollarsusa.com/uploads/1/3/1/0/131070579/0afeb1f3.pdf
    • http://journeytofuntravel.com/uploads/1/3/0/7/130738497/ronebo.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_off00006285.bin
a879acb92c3dad840cdade79bca36586af86f0391f00d0a10e7eeecf39fc9079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 8480 bytes

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