Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ba569ffe71a0df…

MALICIOUS

PDF

48.9 KB Created: 2020-04-06 14:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 08cce490a3eac9a63acab00211c0b3a0 SHA-1: efe3bc3bb5661163aaf9a346acf84280aa923793 SHA-256: 14ba569ffe71a0dfa937eae939472bc9b49d5171901da05dae40dcf2810b9ea3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness, supporting the assessment of a link-farming or redirection attack.

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://phillips-wedding-2019.com/uploads/1/3/0/2/130291434/130291434.html#que+causa+la+fiebre+proteus+ox-19
    • http://sv-og-erp.de/uploads/1/3/0/5/130544539/8697271.pdf
    • http://wildfantasycat.com/uploads/1/3/0/6/130639600/4728662.pdf
    • http://wgluxuryvacationrentals.com/uploads/1/3/0/6/130620416/f59ac9a8.pdf
    • http://hdhlouisville.com/uploads/1/3/1/3/131383673/0d767.pdf
    • http://almiraosmanovicthunstrom.com/uploads/1/3/0/6/130620334/vezogejuniwot.pdf
    • http://books4muslimchildren.com/uploads/1/3/0/4/130489023/wanikuledozetegu.pdf
    • http://itsthebates.com/uploads/1/3/0/5/130588343/zixolefixuro.pdf
    • http://newlifebiblecollege.info/uploads/1/3/0/8/130874513/7012629.pdf
    • http://boydhomeservice.com/uploads/1/3/0/9/130968993/xaroweroro-kokevumigam-sefurojolalibob-vajor.pdf
    • http://kreneephoto.com/uploads/1/3/0/8/130874309/batamijux_tazogeka.pdf
    • http://amishalom.com/uploads/1/3/0/7/130740371/koliveradup-bubupilu-kewuro.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007701.bin
34189a5e7fa29a77515f01a0747ee6b755b68117fe9350a304d425984d1f1926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7701 9012 bytes
font_01_sfnt_off00009798.bin
736cd2d33175a5a13ef050b14347fdc238d98c9b1a4a011ca05e63a00a87de6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9798 1556 bytes
font_02_sfnt_off00009fa8.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA8 16036 bytes

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