Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3bb63bb8281aef…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 07:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5986eb5897abeb51786f6d69a1986069 SHA-1: de14807ff1bec8fc3d90759c0e51c058b6979dbf SHA-256: 7c3bb63bb8281aefed97ad9664cbec0caf7348462b41d8b9cbd02a2add768c1b
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an external URI pointing to a resource related to 'ceh certified ethical hacker book pdf'. This suggests a phishing or social engineering lure, likely attempting to trick the user into downloading a malicious payload disguised as a legitimate document. The presence of multiple suspicious URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/award?keyword=ceh+certified+ethical+hacker+book+pdf
    • https://fenejetamop.weebly.com/uploads/1/3/4/6/134697978/335b4b27.pdf
    • http://lovechat24.club/angelcare_mini_bath_support_reviewdohbh.pdf
    • http://instapodarok.site/how_to_replace_glass_top_on_ge_profile_stove2jmtc.pdf
    • http://criticcxck.space/aaon_stock_report7785e.pdf
    • http://jotijitod.66ghz.com/informix_4gl_tutorial.pdf
    • https://zafapuguma.weebly.com/uploads/1/3/2/7/132712217/zuvebikuz.pdf
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/8974323.pdf
    • http://j3vnci4.xyz/legexesorazunibefebim3m3vo.pdf
    • https://cdn.sqhk.co/saxedade/rQhimwl/gmetrix_answers_excel.pdf
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/1671991.pdf
    • https://cdn.sqhk.co/bipozipo/N0hjUji/truck_drivers_adventure_mod_apk_download.pdf
    • http://silkhfig.bid/23743777842s5ozp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_2befd4d378c14683b2d039af2624520d.pdf?index=true
    • https://s3.amazonaws.com/novifamigot/life_coach_marketing_plan.pdf
    • https://s3.amazonaws.com/jotogorurekuro/how_do_you_cook_a_ham_joint_in_the_oven.pdf
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_fa2efbbfbdc44bd190af22949779fae0.pdf?index=true
    • http://lewizalejeso.rf.gd/tinupidexuvawunegipo.pdf
    • https://s3.amazonaws.com/tozaduliwubega/sevotevawuriba.pdf
    • http://dekefolujif.epizy.com/memizikamoredema.pdf
    • https://s3.amazonaws.com/kiguteperilodu/31995190943.pdf
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_360af410c4624036a3a8a8eb64441365.pdf?index=true
    • https://s3.amazonaws.com/luropiw/hoshin_x-_matrix_excel_template.pdf
    • http://pifutujotot.epizy.com/munumotoximanaginede.pdf
    • http://bodotekufuw.rf.gd/citocinas_definicion.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35a.bin
aba60d439f376c8f6ddb288c2961563f02a9f5241f14f4ff3a4583a884fa840d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 5172 bytes
font_01_sfnt_off000104e3.bin
c580c9e3085450c003ae8c8abf7ac17a7da7fbed327e7d177410307a344ef4a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E3 11160 bytes

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