Malicious PDF — malware analysis report

Static analysis result for SHA-256 8491b2b4dc7be38a…

MALICIOUS

PDF

80.0 KB Created: 2021-04-02 21:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a27c89ecfc4e37cc62f038dacc4e40cc SHA-1: b19b943820373bafb2bc8242eb16025cfbd810b7 SHA-256: 8491b2b4dc7be38aefc071fabcc874f77ae762847e9da0e25f204581967cff92
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_ENABLE_LURE' heuristic indicates the document likely contains instructions to enable macros or editing, a common tactic for malware droppers. The presence of numerous external URLs suggests a phishing or credential harvesting attempt, or a distribution point for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://nipisod.ru/award?keyword=pdf+to+word+ocr+large+files
    • http://www19216801.site/sodegegusejo3urs8.pdf
    • http://sizegoduxuxa.mygamesonline.org/ripidemekowogo.pdf
    • http://guxiket.iblogger.org/luxakebupibebefugekaso.pdf
    • http://pofaduxiruk.getenjoyment.net/lapesebuzilalem.pdf
    • http://vigikigopaloze.medianewsonline.com/21415180901.pdf
    • http://togilikosilit.22web.org/gikum.pdf
    • http://volupixo.mygamesonline.org/39040703657.pdf
    • http://zarabatyivat.ru/fivuvozawumetipenuf78jw.pdf
    • http://servempieza.site/94010877483p2g7g.pdf
    • http://getcabinets.xyz/nevusixopemvlho.pdf
    • http://zeboxagekej.sportsontheweb.net/20514349186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jinugiwi.atwebpages.com/hollow_blocks_manufacturing_process.pdf
    • http://mofapaxuwalix.rf.gd/a_history_of_the_american_peoples_summary.pdf
    • https://s3.amazonaws.com/jupevuxirapi/what_is_in_business_analytics.pdf
    • https://s3.amazonaws.com/jujojomojemiz/adnoc_new_logo.pdf
    • http://datatoxozapi.epizy.com/irregular_nouns_worksheet_grade_5.pdf
    • https://s3.amazonaws.com/fadedosi/judevejafuwuwizigesopi.pdf
    • http://duzixojaxop.rf.gd/unoisetion_cavitation_machine_manual.pdf
    • http://wufajin.rf.gd/deepmind_alphago_zero.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0f.bin
13dec7de26f04f29fc2a0bac474576c5f6d35935ea52beb26c92c6b41a61a40c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 4964 bytes
font_01_sfnt_off0000ff11.bin
0c4fb46acb4dbb2c62fe89990c3cc0fb69f3cb8c80d89f3a9fdac45a963aad76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 10992 bytes
font_02_sfnt_off000124c3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124C3 4324 bytes

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