Malicious PDF — malware analysis report

Static analysis result for SHA-256 622a6a9864f7faf5…

MALICIOUS

PDF

83.7 KB Created: 2021-03-06 02:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 84fe329ab52b862694d0928cf237e842 SHA-1: 42d527d44814acb4655c7b868413e83d8aef6927 SHA-256: 622a6a9864f7faf5b8e4f2fe8be99c3eeb22fdd529be98b1505dfdd1a81dd296
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely serving the malicious content. The document body, though heavily obfuscated, suggests a lure related to 'piano sheet music'. No scripts were extracted, but the PDF structure and external URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=walking+in+a+winter+wonderland+piano+sheet+music+pdf PDF link annotation
    • http://merogerofame.66ghz.com/math_questions_and_answers_grade_11.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/j8ngfDU/80885081249.pdfIn PDF document text
    • http://sandiego-podcasts.com/40697514017bynxh.pdfIn PDF document text
    • http://gratoram.site/lotonofanegivon36aor.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/giribib/merge_town_game_online.pdfIn PDF document text
    • http://revershjtb.site/catalog___panasonic_2019la2ug.pdfIn PDF document text
    • http://ewop.space/how_to_use_the_light_meter41nfx.pdfIn PDF document text
    • http://tersq.space/ubisoft_report_bug_assassin_s_creed_odyssey4n22i.pdfIn PDF document text
    • http://wildboost.club/android_software_version_2019ic2lj.pdfIn PDF document text
    • http://detonic-italia.website/el_nuevo_testamento_interlineal_grieizfiv.pdfIn PDF document text
    • http://uber-global.com/study_guide_for_the_gift_of_the_magiubohu.pdfIn PDF document text
    • http://zespodsvetkoy.site/automatic_call_recorder_app_for_iphonechqbo.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/UgeEidu/mobuvedekijewu.pdfIn PDF document text
    • http://detonicro.website/introduction_to_data_mining_pang-ning_tan_downloadepg8h.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/8iiPidm/download_football_2015_java_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/wie6ueh/17034416018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://ruxomipeb.epizy.com/audio_books_english_grammar_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/naxuvuriweru.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/gopomokikubu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/partnership_account_balance_sheet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/hello_world_kotlin_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/vovebanefanazazoxunugudif.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/tamil_movies_2015_list.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/78799519574.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/definition_of_adolescence_by_different_authors.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 5736 bytes
SHA-256: ae544135d934cfad7ee488b76170a3a7b95909af13d5d736c7e2d7762036add1
font_01_sfnt_off00010787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10787 7500 bytes
SHA-256: 3afb402c6631f91192a1c6ab4fb403d919b3a818346722894cd6a90d77cf0e08
font_02_sfnt_off00011c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 11020 bytes
SHA-256: d569eba37ed341e276f0fab2fc7f662aee35b070f6a3800435ae398987a5ea6a

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