Malicious PDF — malware analysis report

Static analysis result for SHA-256 62873f6a4e9dfcfd…

MALICIOUS

PDF

127.1 KB Created: 2020-04-02 06:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 14faf961160c2537c8da114b4fce40c9 SHA-1: c31f411450fdf47b2a6e1ed0662074a8e09686ae SHA-256: 62873f6a4e9dfcfdb389532404157140cfee560e345e9a946f8382c00d363862
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to host malicious content. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to potentially harmful sites.

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://lorlynconsulting.com/uploads/1/3/1/3/131379748/131379748.html#metodologia+y+tecnica+de+la+investigacion+juridica+jaime+giraldo+pdf
    • http://latestfaith.com/uploads/1/3/1/3/131381151/8635946.pdf
    • http://swepta.com/uploads/1/3/0/8/130815381/4824245.pdf
    • http://artemiseyewear.com/uploads/1/3/0/7/130738607/184a815da.pdf
    • http://mmas.services/uploads/1/3/0/7/130739625/fekokufevijepopebif.pdf
    • http://vitalityacumedicine.com/uploads/1/3/0/6/130621732/3656456.pdf
    • http://hairdetoxtea.com/uploads/1/3/0/3/130313632/tebinaxigupat-gojubi-pesufixomawev-wosexifok.pdf
    • http://hiatthallconsulting.com/uploads/1/3/0/9/130969735/wusowiterekilazetu.pdf
    • http://odinsmokeshop.com/uploads/1/3/0/5/130543671/palazar.pdf
    • http://egametrivia.com/uploads/1/3/0/7/130776265/mimugete.pdf
    • http://fuckyoutickets.com/uploads/1/3/0/8/130873801/cb715d.pdf
    • http://visual-career-guides.com/uploads/1/3/0/6/130604313/aadc3e7ffa09.pdf
    • http://villarrealenergy.com/uploads/1/3/0/2/130273617/9466075.pdf
    • http://menwahaber.com/uploads/1/3/0/9/130969759/xuzanowixu_zepuzedesib_bivarole.pdf
    • http://avidogessentials.net/uploads/1/3/1/3/131380184/rebijomitimilobe.pdf
    • http://educationtaa.com/uploads/1/3/0/6/130604632/vawexafebafadu.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001be23.bin
89d646adb427b86723811507fc497ae7baf221b353843db7cbee3f0a52ad1e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE23 2100 bytes
font_01_sfnt_off0001c7a1.bin
c1f2dac55e4e4070c3933cc77dac7fcb98ec1ba6769ce214f0fd8575676c3d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7A1 10132 bytes

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