Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efd28ea731c8f12…

MALICIOUS

PDF

91.5 KB Created: 2021-03-17 08:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccf32083cfc9cab8abb4e63db55892c4 SHA-1: 7912badc411ddf285b9170ba74915b3a792becb9 SHA-256: 4efd28ea731c8f120ffb979a30340d9f046f4cb8d45b3da6095bc5e2f335c09f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'Wordpress tutorial for beginners'. The presence of external URIs indicates an attempt to redirect the user to a potentially harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=wordpress+tutorial+for+beginners+step+by+step+ppt
    • http://sagunutu.medianewsonline.com/30206675677.pdf
    • http://posadukik.getenjoyment.net/definition_du_business_plan.pdf
    • http://pedagodogiko.getenjoyment.net/56855098653.pdf
    • https://cdn.sqhk.co/detatakev/gdgfOgd/vemegepeluxebufuwabelujup.pdf
    • http://kesuvajeb.scienceontheweb.net/attestation_d_hbergement_prefecture.pdf
    • http://memowelubi.mygamesonline.org/kesilizonarag.pdf
    • http://mbfsopg.com/tegelileva73zvh.pdf
    • http://bometaximom.scienceontheweb.net/sui_sin_far_mrs._spring_fragrance_analysis.pdf
    • http://tipofeliluget.medianewsonline.com/92788906165.pdf
    • https://cdn.sqhk.co/sivadapexiri/jiRgdOj/le_republique_restaurant_los_angeles.pdf
    • https://cdn.sqhk.co/numisezopo/bErgdhh/the_night_stalker_movie.pdf
    • https://cdn.sqhk.co/voduzetefir/jggjf2e/10372849226.pdf
    • http://fb-ig-copyright.com/modapiwulegdx5g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d0749fd7-7293-4537-85d6-56e02b15b8c2/90978614105.pdf
    • http://fekobovovexi.epizy.com/fantasy_football_2019_cheat_sheet_standard.pdf
    • https://uploads.strikinglycdn.com/files/c233a731-96c8-40fe-86fd-1556990be0a5/zalagexufatonatis.pdf
    • http://mufasiloxinak.epizy.com/ubqari_magazine_march_2019_free.pdf
    • http://kopolug.myartsonline.com/bimutagifimom.pdf
    • https://uploads.strikinglycdn.com/files/fe78d1c3-65e2-4361-acda-1d75734d79cf/paradise_lost_translation_book_5.pdf
    • https://uploads.strikinglycdn.com/files/051245d6-56cf-4e52-b697-c66501f2e586/33743044226.pdf
    • https://uploads.strikinglycdn.com/files/4c837e9b-0dae-40e7-bc36-3bbf7559f3c5/lightbown_p.__spada_n._2013._how_languages_are_learned._oxford._4th_edition.pdf
    • http://zasuwunal.myartsonline.com/25934502242.pdf
    • http://wiwowefitupek.epizy.com/job_application_cover_letter_template.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_off0001271b.bin
0160ea784b4a04c1fa6c9e2b6b16e27964c2de73b4e7288e63db1d4bfe5416bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1271B 5464 bytes
font_01_sfnt_off000139cf.bin
2c59447f9f6da0322512c767ccbc22b72a05aa08fd655de4065eceaac347d5a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139CF 10908 bytes

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