Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f67a86b4ad9306…

MALICIOUS

PDF

88.3 KB Created: 2021-02-16 21:31:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d8114979791fbea62638888b527e4a2c SHA-1: f6ea9e85f04cd6d6f18b41aa4510990485da204d SHA-256: 64f67a86b4ad9306a883d950410fd76ae93d9932f7331a55ab641cc62d1be359
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating it is likely a phishing or trojanized PDF. The embedded URL `https://jacksth.ru/strik?utm_term=echo+show+2+owners+manual` suggests a lure related to an Echo Show 2 owner's manual, likely intended to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed for initial access via phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=echo+show+2+owners+manual PDF link annotation
    • http://wersita.fun/71180894682egckk.pdfIn PDF document text
    • http://topstudy.fun/blood_type_test_lab_reporttdb51.pdfIn PDF document text
    • http://sarkife.site/bahubali_2_tamil_movie_tamilrockers_201759aq3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_60174fda60df0.pdfIn PDF document text
    • http://cardioactiveitalia.site/18923020493lmy8q.pdfIn PDF document text
    • http://nawireg.22web.org/budusaminabaxituf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidefos.epizy.com/82502200725.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/nevodasunevijufilutitoju.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/786750934.pdfIn PDF document text
    • http://savefativiluz.epizy.com/aprendizaje_activo_en_preescolar.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/xifemebuwiwemi.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/56813311796.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/bodyguard_movie_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/error_validating_access_token_facebook_android.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00012deb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12DEB 22332 bytes
SHA-256: 1d85e79cce067c6679407c30d5dce4b78cf6c12ebc1bd0ec471561c736a5bfd3
font_00_sfnt_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 9064 bytes
SHA-256: a36e928cae0fb9040812c79973033a7a42d9d3af082e4e85b6567a40bff3cb8a
font_01_sfnt_off0000f46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 5220 bytes
SHA-256: 81d61300bf01b0ffa1fe61931d68b526fbe8188f965c221cd4228f753ca441bb
font_02_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 12160 bytes
SHA-256: a4f665ea001348ddd1f9d21dc1dac143917a77e693c827ee7676eee3a10857b6

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