Malicious PDF — malware analysis report

Static analysis result for SHA-256 57dd6260fb53999f…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 23:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb0f320d56054b684f66dce1dadf094 SHA-1: 358bf1a283f53095f44aed6c31423531b96e66d6 SHA-256: 57dd6260fb53999ff330a2c2e8807ad12b70064b675a39ae47c9037a0e8f1b43
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a website disguised as a study guide answer key, which is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=environmental+science+chapter+11+study+guide+answers
    • http://kalidejomepajo.scienceontheweb.net/60546106265.pdf
    • http://niwadeg.mywebcommunity.org/28390634172.pdf
    • https://cdn.sqhk.co/bofilewidil/DpniMgg/parkour_goes_horribly_wrong.pdf
    • http://penageli.getenjoyment.net/83902842024.pdf
    • https://cdn.sqhk.co/luwibajik/gdgjghe/35078059031.pdf
    • https://cdn.sqhk.co/wubunepan/a2vZCV4/wewowudagu.pdf
    • https://cdn.sqhk.co/pabopimi/i5ifWjd/download_castle_defense_2_mod_apk_revdl.pdf
    • https://cdn.sqhk.co/jimavidozeze/ChfKfsw/luckley_house_school_ofsted_report.pdf
    • http://nefozufovi.scienceontheweb.net/cavitation_corrosion.pdf
    • http://libuwapuvewipev.mywebcommunity.org/bibavanonojeme.pdf
    • https://cdn.sqhk.co/rifasidajika/zdp1ieD/amorphous_forms_of_silicon_dioxide.pdf
    • http://lisuzigerob.mygamesonline.org/35866994484.pdf
    • https://cdn.sqhk.co/feketukadoz/luidbhj/pitiwibamujojex.pdf
    • http://wumiwuzigimo.mywebcommunity.org/is_there_a_monthly_fee_for_verizon_jetpack.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nodetuxapabara/3971020188.pdf
    • https://s3.amazonaws.com/sagotomagin/98108194677.pdf
    • https://s3.amazonaws.com/ligole/tv_guide_listings_mesquite_nv.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_off0000eae4.bin
f04477d77481010fca57f2402f8eadf1ab4ed63088efa12797825d34a748cab7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 5632 bytes
font_01_sfnt_off0000fdf4.bin
d34a2f9857d6acdb2a4ceb7432a77120f481ef22f19b04fd33534c610144aa73
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF4 10796 bytes
font_02_sfnt_off000122cc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 4324 bytes