Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace2da45d8bb8384…

MALICIOUS

PDF

77.9 KB Created: 2021-02-06 19:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a1449489adb24211dead6a1226467bb SHA-1: 96eea426e4860d71c66258b4a0c5329be9f1f9fd SHA-256: ace2da45d8bb8384a2b8f588f33be9062a82373281408fc0e42bbae42c7d7730
104 Risk Score

Malware Insights

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

The file is a PDF that contains a lure for a 'board of intermediate education karachi certificate form'. It also includes a heuristic firing for a PDF URI pointing to a suspicious URL, and ClamAV detection as 'Pdf.Phishing.Trojan'. The presence of a visual download button further supports a phishing or social engineering attack. No scripts were extracted, but the overall context suggests a phishing attempt to trick the user into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wb?keyword=board%20of%20intermediate%20education%20karachi%20certificate%20form PDF link annotation
    • http://nasty666.space/descargar_el_pianista_latino_hd81zjp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_600f76111f514.pdfIn PDF document text
    • http://dotuzodozo.22web.org/22609642985.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_6004e73566aab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457272/normal_60065c4d959d4.pdfIn PDF document text
    • http://nigma24invest.online/24803498571o9if7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481513/normal_601dd18fca481.pdfIn PDF document text
    • http://helplnstagram-confirm.com/cost_of_automatic_transmission_vs_manual_transmissione6s31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445736/normal_5fd3b75d91f5e.pdfIn PDF document text
    • http://ibkreactiva2020.com/mijadipitenozawocarp6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zabobenalug.rf.gd/intro_music_video_maker_pro_apk.pdfIn PDF document text
    • http://sovavovekemaz.epizy.com/mechromancer_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/53796315264.pdfIn PDF document text
    • http://xadejozad.rf.gd/talking_caller_id_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/codycross_answers_group_17_puzzle_4.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/liketiratijex.pdfIn PDF document text
    • http://kozifina.epizy.com/botello_elementary_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/ielts_speaking_questions_2018_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/93457669637.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/language_and_reality.pdfIn PDF document text
    • http://badivisixeg.epizy.com/mogamusagixodopepimisijes.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/58465256894.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 5164 bytes
SHA-256: f883647682d44f8232dfdd55b42d217f414dcae97eb290728021b17ca3add35e
font_01_sfnt_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 2124 bytes
SHA-256: ab1745a64f8c5f0a11a62892d0684c37f9aeba17238883451f08c1decea0e192
font_02_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 12312 bytes
SHA-256: 64c48f16997d278a1d1bc59a94c9fb934044c0171ece0daa8770a15c9e983189
font_03_sfnt_off00011405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11405 16104 bytes
SHA-256: 7197da45ea288395dfe4f60e6f10758258a5bf209266d9c14589854c7f3ec9d4

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