Malicious PDF — malware analysis report

Static analysis result for SHA-256 65263a239836b2b3…

MALICIOUS

PDF

76.8 KB Created: 2021-03-29 07:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd15e87da89a0cc739ee15629f0e0dd3 SHA-1: 5814952eb444771d9647051c823207b79acc803b SHA-256: 65263a239836b2b327cae18f2b0ce15801af8b91a8e28e8b7c6fea741db7ba40
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 as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, many hosted on Weebly, suggesting an attempt to create a link farm for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://crophysi.ru/award?keyword=all+of+me+piano+pdf+jazz
    • https://mufaguzesevulet.weebly.com/uploads/1/3/2/8/132814956/5083707.pdf
    • http://everydays.space/jofimajorebobobadimu2cmby.pdf
    • http://lami-lashes.site/wexamaferetuwutifanoiss2e.pdf
    • https://lefojokux.weebly.com/uploads/1/3/5/3/135399193/c7b7e9a6a0749b.pdf
    • http://xamoxipuwizutux.scienceontheweb.net/dujexoleko.pdf
    • http://obschee.xyz/9798407969hzroe.pdf
    • https://veralekixa.weebly.com/uploads/1/3/1/0/131069874/dagumawavegaxapu.pdf
    • http://mudikovarew.mygamesonline.org/beats_wireless_headphones_manual.pdf
    • http://taforojujutusig.mygamesonline.org/can_a_cracked_heat_exchanger_be_dangerous.pdf
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/jegajov.pdf
    • https://gavojaxuwutik.weebly.com/uploads/1/3/4/3/134319320/kasapuwosibuwu.pdf
    • https://zufuleruzu.weebly.com/uploads/1/3/1/6/131637307/zarafifolexexob.pdf
    • http://lowufadit.scienceontheweb.net/13217104795.pdf
    • https://dopitusorotid.weebly.com/uploads/1/3/0/7/130738794/73b1bd1d66c21f.pdf
    • http://itprod.space/how_to_set_g_shock_analog_timeankt6.pdf
    • http://zabemaladameg.medianewsonline.com/xoziloxo.pdf
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/7315346.pdf
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/tibebaxax_wofakesufani.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wegugoleta.onlinewebshop.net/mupuxaxado.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29f.bin
2fcbc003611614fcc5c8cfc5ab3d353bdcb82819a4cd8b6fa30881d2d20dd2f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 4736 bytes
font_01_sfnt_off0000f2a5.bin
4b36477c3bc316ad5094fa63129726cb9ca6d4198a37d1773996d60dd2dbca29
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 11216 bytes
font_02_sfnt_off0001184b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1184B 4324 bytes