Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd100d5419c69f58…

MALICIOUS

PDF

102.4 KB Created: 2021-03-28 05:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d180dc3ce01276a014bc65daf6d14f8c SHA-1: b7f2c291ad0d579cc06d8ca8690c94a08bca6009 SHA-256: dd100d5419c69f5814eb39c021d999b93c2a2ffc9b060453983d07ac4e35d1f1
104 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 external URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload. The presence of a 'download button' heuristic further supports this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://bologen.ru/award?keyword=brahmastra+maths+book+pdf+download
    • http://kayikciakademi.com/foreo_luna_mini_2_guide29m22.pdf
    • http://semaledixuz.iblogger.org/89759349515.pdf
    • http://sibiwuketilivi.22web.org/autocad_lisp_tutorial.pdf
    • http://kajejib.medianewsonline.com/estrutura_da_administrao_pblica.pdf
    • http://ru-payment.casa/information_about_bugatti_la_voiture_noireq9xsn.pdf
    • http://luxasireku.sportsontheweb.net/6th_to_10th_book_back_questions_and_answers.pdf
    • http://mitipevebedo.iblogger.org/badogesapajixomet.pdf
    • http://rameautbxy.space/xasakasolatozekvp5v.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/vabemavuputenif/68428558449.pdf
    • http://jetafiwo.epizy.com/jomewobad.pdf
    • https://uploads.strikinglycdn.com/files/24ebe12c-6063-4d56-84c5-901654b74739/air_force_academy_acceptance_rate_2020.pdf
    • http://gapoxuvopa.onlinewebshop.net/duzudaginakuk.pdf
    • https://s3.amazonaws.com/befarekogol/39174896681.pdf
    • http://sutekotuluzuwed.rf.gd/lds_primary_birthday_gift_ideas_2021.pdf
    • https://uploads.strikinglycdn.com/files/84b96aa9-a5e2-40d5-9df2-c95f61faa410/14435014086.pdf
    • http://xivikinobuni.epizy.com/prime_factorization_worksheets_with_answers.pdf
    • http://kawixowovisekek.epizy.com/vusazurupuruxagujutusajox.pdf
    • http://vuruwabudakase.epizy.com/stone_tiles_roofing_sheet.pdf
    • https://uploads.strikinglycdn.com/files/04db36fc-0e3c-4208-bc03-a93d96c7244a/how_often_to_change_oil_on_a_prius.pdf
    • https://uploads.strikinglycdn.com/files/f10cf427-8223-474d-aa6a-055cf5f35b0b/71784021619.pdf
    • https://s3.amazonaws.com/ditiruz/butugapizaduzofidefosupeb.pdf
    • http://jivemufafalaz.rf.gd/jidusekesusuxis.pdf
    • http://fugewad.rf.gd/napexupagosawu.pdf
    • https://uploads.strikinglycdn.com/files/aa20378b-26bb-417d-a2bc-81d20d229a50/taxumaniwaxelagaso.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f647.bin
97698020dc10771c606c177d41b444c72d62f69eff19bfc64b548a20a3bae9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 5248 bytes
font_01_sfnt_off000107f4.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 3720 bytes
font_02_sfnt_off0001134f.bin
3bcd98d3a5eaff040f0fff44fcce2bf0d36ee5f09c10293edeefef7b9bc92b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1134F 2572 bytes
font_03_sfnt_off00011e95.bin
7e77e574a499d8a39a981e3db5fd23ae4d89c9b4215bf93e9635333132f48d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E95 12032 bytes
font_04_sfnt_off000146bb.bin
bdb498a84294d2700f74802134fcccbe9562d64435b5e6d8d4f3fb931e33cb92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146BB 16144 bytes
font_05_sfnt_off00015bb5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB5 4324 bytes
font_06_sfnt_off000169b6.bin
1a215001b3eabefe6be59b1a09bbe9ed0746cea057ba31990a7984db31c0a9e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169B6 10280 bytes

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