Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efe0c8846928f8a…

MALICIOUS

PDF

64.1 KB Created: 2021-02-09 12:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b0ea154837477e0e9f3a3dc9e99f4051 SHA-1: 20e352c988c28454121e4f65436c24c0fa4954d9 SHA-256: 3efe0c8846928f8af172fa8d8f9eded8b852b600445818be574be6e96344a655
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a decoy, with the primary malicious function being the redirection to the external URL for potential further exploitation.

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://baarspo.ru/aws?utm_term=lenovo+ideapad+320+data+sheet PDF link annotation
    • https://cdn.sqhk.co/gijesali/jeicBUm/find_my_friends_app_not_working_since_update.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/81jj5jj/.pdfIn PDF document text
    • http://health-top.ru/retusigedoebvh8.pdfIn PDF document text
    • http://pomuropujuj.22web.org/kovavelunagozak.pdfIn PDF document text
    • https://cdn.sqhk.co/wemupaxuziv/hihiahj/lineage_2_revolution_forum.pdfIn PDF document text
    • http://smartcreditcheck.info/995067974828q1ra.pdfIn PDF document text
    • http://segipaxi.iblogger.org/55257909102.pdfIn PDF document text
    • http://jufidozotazi.66ghz.com/irrational_exuberance_author_robert_shiller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/repidadulato.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/25888345674.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/rojegevetoxedofajo.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/wedani.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/ardhito_pramono_superstar.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/6200872632.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/vaste_song_djbaap.pdfIn PDF document text
    • http://xatosizukav.epizy.com/streaming_audio_recorder_full_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8B 5356 bytes
SHA-256: 23d6a7bb424b534ca53506a2cfea6e6b05d72042eb3225fe7b926c6ab7c56db2
font_01_sfnt_off0000d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CC 10184 bytes
SHA-256: d3fd2fcc88a00b87f1e4a036af2fe0d6915e098475a7ba6eab672299509ee7ab

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