Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f27f7fb0dbf2e50…

MALICIOUS

PDF

76.8 KB Created: 2021-03-24 06:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 141f8ec0437dd9e25b00de961006d25a SHA-1: 363086a011d8f25a768f1dc549a16cb39eb5de43 SHA-256: 5f27f7fb0dbf2e505ceb07228f4df67c7be1ffe11c032ed7853cccae1091642b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains multiple embedded URLs, one of which, 'https://jumiwimov.ru/award?keyword=karies+gigi+adalah+pdf', is directly associated with a heuristic firing for external URI. The document body, though heavily obfuscated, contains text related to 'Karies gigi' (dental caries), suggesting a lure to disguise the malicious intent. The presence of embedded URLs and the nature of the detection indicate a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/award?keyword=karies+gigi+adalah+pdf PDF link annotation
    • http://sallely.xyz/683303249877rfqn.pdfIn PDF document text
    • http://wififej.mypressonline.com/lc_circuits.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/53888753705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_6028b4334dbe6.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/how_much_does_a_marketing_coordinator_make_in_canadaobsz9.pdfIn PDF document text
    • http://santaparker.store/fusafemoborurqjcbw.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/wanupezusemibod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_5fd663d139cf7.pdfIn PDF document text
    • http://opt15.ru/7155941652670k2p.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/igcse_chemistry_notes_2020.pdfIn PDF document text
    • http://karnaval.host/341424751383gr1a.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/supply_chain_management_notes_for_mba.pdfIn PDF document text
    • http://mopewogubit.getenjoyment.net/lakobotarimagazowinasis.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/powakula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/setikizo/gufevej.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/azadi_movie_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/link_s_awakening_bottle_grotto_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/cambridge_math_book_grade_7.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/22278472508.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 4764 bytes
SHA-256: 1eb2a515b41c1e7dc638b40ffe40474219b491b2de99d916c57eda524af59d7a
font_01_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 9968 bytes
SHA-256: 8635f0af141cd0e263baa265de077db25d20c79ae34a46fc77f6190ca35e6982
font_02_sfnt_off000117ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117ED 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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