Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11236577068ddfc…

MALICIOUS

PDF

179.3 KB Created: 2021-04-07 04:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa94016fa34e1d73ef0d4a914bc6b645 SHA-1: 5989f4c23b9e33d8265c6756b15243f23e0da0eb SHA-256: f11236577068ddfc6ea553a45d3f6c9ca59eee5c6113ea34dd4f26c490de2772
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for educational content, likely intended to trick users into downloading a secondary payload. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=lesson+10.2+practice+b+geometry+answers+pages+603-611
    • https://cdn.sqhk.co/migazajigum/hiij7v8/20594595462.pdf
    • http://ita-bio.fun/duxijarusatarelowuborisbkjv.pdf
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5ff94233e5169.pdf
    • https://cdn-cms.f-static.net/uploads/4446651/normal_602557aa6c4cb.pdf
    • https://cdn-cms.f-static.net/uploads/4379489/normal_600e458d7f527.pdf
    • https://cdn.sqhk.co/xaranoraf/ijxnhdJ/toxuva.pdf
    • http://gedatidigog.sportsontheweb.net/91018281769.pdf
    • http://familyit.info/daily_language_review_grade_30l2m9.pdf
    • https://cdn.sqhk.co/dumadomizore/Pmo5gdK/52475184005.pdf
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fe79d85e72ad.pdf
    • http://therarbooks.com/rupinder_gandhi_photos008ak.pdf
    • http://pressit.space/four_goals_of_psychology40sqq.pdf
    • https://cdn-cms.f-static.net/uploads/4491153/normal_604a103fc74b2.pdf
    • http://muvepifare.mygamesonline.org/herana_epigentica.pdf
    • https://cdn.sqhk.co/kobadaxo/eOhgmjh/watch_movies_with_friends_amazon_prime.pdf
    • http://tanijijud.sportsontheweb.net/tesla_model_3_for_sale_houston_texas.pdf
    • http://podifodosej.scienceontheweb.net/what_time_does_the_sun_go_down.pdf
    • https://cdn.sqhk.co/fedelubu/lHLggge/the_ordinary_retinol_serum_ulta.pdf
    • http://www.gust.org.pl/projects/e-foundry
    • http://dejavu-fonts.org/wiki/License
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • https://s3.amazonaws.com/sisaxu/letra_porque_el_amor_de_mi_alma_solito_me_dejo.pdf
    • https://s3.amazonaws.com/gewisetug/printf_date_format_bash.pdf
    • http://wonanikapudidak.atwebpages.com/givuxazirojorujurol.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
    • http://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002370e.bin
2df0ec481a02092c558726d1d7f641e0bc431223264d4eb581407d2a289ee281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2370E 2012 bytes
font_01_sfnt_off00023fd3.bin
53358a099c53e995261f52cb8f6f628e5eeb732a2f5c95b63e2a71cc21fc409a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FD3 6204 bytes
font_02_sfnt_off000254ff.bin
8b3cd21cdda7a0f6be45806684c4885a10655602858f3c17037373f9b7b3184d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254FF 20992 bytes
font_03_sfnt_off00027501.bin
c72053f1ac8074c0051615f5c2f48d0033e82dfe72b1acc7b3564c414d9aa67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27501 1188 bytes
font_04_sfnt_off00027bd4.bin
ee8e75b935130231e0ede5516b29c0f21be76f8d12c14bb4eaeae76f4ab086fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BD4 13000 bytes
font_05_sfnt_off0002a790.bin
608b6fd44288dee1e7b4933e9c48b5e5ac5ce8c7a572951f5619f98c11b2df3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A790 16424 bytes

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