Malicious PDF — malware analysis report

Static analysis result for SHA-256 1915f1651364129e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-02 22:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 57e5b3d785bc0b060a7da586e930ea96 SHA-1: be2ea9d98ea0536f678ace0b30e71dc9ebb81de0 SHA-256: 1915f1651364129e486d15af7a7300ffa2ef953f30d629b30ac72af0123613e2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ML classification and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a technical document.

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://jacksth.ru/123?utm_term=geotechnical+engineering+donald+p+coduto+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fd677cab9cfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456119/normal_5fdda2350d41e.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/jiwotarotavuz/woveronijifuno.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/alphabet_worksheets_for_esl_learners.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/48833165763.pdfIn PDF document text
    • http://topagujowulefe.epizy.com/all_feeling_songs.pdfIn PDF document text
    • http://pimisigejofal.rf.gd/bhojpuri_video_film_ka_gana.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/54865501470.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/35142035588.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/77088247422.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/defawageserolujojiguzilux.pdfIn PDF document text
    • http://felawikemuda.epizy.com/18221161657.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/53435143657.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/dufimapiraxule.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/99268317982.pdfIn PDF document text
    • http://sedobuxekazadi.rf.gd/zunizefojeresukokanas.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_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 5268 bytes
SHA-256: 123f84b5e8d6c947a5c526000db1939b028418f73b6ea33d4967c726c53802f1
font_01_sfnt_off0000f61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61F 10580 bytes
SHA-256: 7db945239f5b15bcd2886e24ce772424c7b7f321267d8b7b510781f5a96d1c95

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