Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83c681a23e1aef5…

MALICIOUS

PDF

82.3 KB Created: 2021-03-30 23:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6f0d78597fda21f68059a3b52f4b88 SHA-1: b52243fd60e76f08589a284dfaa3f995370ec563 SHA-256: c83c681a23e1aef59c2b6015e15b54b39ab3e4a77ae8bcae5b99c786b2108f4e
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a malicious domain, likely intended to deliver a phishing lure or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'furby' toy values, suggesting a social engineering tactic.

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://midufefew.ru/wix?keyword=go+furby+value+guide
    • http://shoop-fk.ru/english_speaking_course_learning_videoghovy.pdf
    • http://moshon.space/lightest_android_emulator_for_windows_10arz1v.pdf
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/2513851.pdf
    • http://zitirisiz.mywebcommunity.org/trastornos_alimentarios_en_nios_y_adolescentes.pdf
    • http://rasudilikid.mywebcommunity.org/short_stories_in_english_for_competition.pdf
    • https://pekupepavipojev.weebly.com/uploads/1/3/1/8/131872203/kifenidisexa_wotalozamame_wobudejoxuxot.pdf
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/xakakafo-mamuvogitebodid.pdf
    • https://sizugive.weebly.com/uploads/1/3/5/9/135993047/lovovolavuputo.pdf
    • http://edevletorg.com/walmart_black_friday_11_14_saleogijg.pdf
    • http://ridaxaki.mywebcommunity.org/casio_hr-8tm_calculator.pdf
    • http://bukuminuwakub.mypressonline.com/simple_articles_exercises.pdf
    • http://zejirejajedudu.getenjoyment.net/tezipetomudajezesox.pdf
    • https://bikonate.weebly.com/uploads/1/3/4/7/134715396/fefolozowapogaril.pdf
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/lugitusolape.pdf
    • http://reliables.ru/5382266330f7sb4.pdf
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/7818840.pdf
    • https://timokejega.weebly.com/uploads/1/3/4/4/134454798/7c1e7.pdf
    • http://digitalcalakk1.xyz/618774618533p6hq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fukokikedusej.epizy.com/59276263926.pdf
    • http://molagegivijoxu.onlinewebshop.net/baron_emotional_quotient_inventory_questionnaire.pdf
    • http://poborunedajemo.onlinewebshop.net/a_fora_o_poder_dos_anjos_da_cabala_gratis.pdf
    • http://jawuwibunoropo.atwebpages.com/canary_wharf_shopping_map.pdf
    • http://ripokemit.epizy.com/35567159858.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_off000102d3.bin
468d8ffbabcc68cabcef9dbae9ca7a1f2a1952c960507dad9360add004cad45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 5228 bytes
font_01_sfnt_off000114bf.bin
f30bd579a3695ab20615fe5214be47fa18610c3d09e9ce914ecbf86acb2336d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 11520 bytes

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