Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf5b580a4e07d14…

MALICIOUS

PDF

94.3 KB Created: 2021-02-12 09:00:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f36b04cff3d6924b94799ad53a04c475 SHA-1: 8ed749004d6080808fc89f82d958c77435c924a8 SHA-256: daf5b580a4e07d141dda79c2041066a404647217ff8fc6348629b986d52c5ea7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL and document body content suggest a phishing lure related to 'espiar whatsapp', aiming to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack designed to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/123?utm_term=espiar+whatsapp+2017+gratis+en+espa%25C3%25B1ol PDF link annotation
    • http://keepxufi.space/50060258469squrn.pdfIn PDF document text
    • http://brumbum3.xyz/5440797714497zqu.pdfIn PDF document text
    • http://pokemonrivals.online/alien_shooter_3_free_download_for_windows_10stxig.pdfIn PDF document text
    • http://cupe1.ru/deadmau5_strobe_sheet_music_pianod2q70.pdfIn PDF document text
    • http://copyrightmediahelp.com/website_er_software_list5g4fq.pdfIn PDF document text
    • http://itclick.pro/54111096017xjewk.pdfIn PDF document text
    • http://priz24.site/89469612160pji8a.pdfIn PDF document text
    • http://my-favshop.online/846025257ca84d.pdfIn PDF document text
    • http://frukt.fun/final_fantasy_vii_remake_review_kotaku15cf4.pdfIn PDF document text
    • http://genoray.pro/90546646803gnyqn.pdfIn PDF document text
    • http://grandov.pro/gifedepelcecsn.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/wofaxil/turorasuveke.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/vorinasikomejamov.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/donefagazosa.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/answer_definition_thesaurus.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/gedesa.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/tuxaduken.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 6968 bytes
SHA-256: 3a9eaea0bc45a07caea7db93d77555b0bd9cd92cee607ceaa9bade33be78aa3c
font_01_sfnt_off00010f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F24 5748 bytes
SHA-256: 5bb4121fa8cbcdb811cb6d159173adbb5a50e20f4244ee8cd1d432ff0e873698
font_02_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 1940 bytes
SHA-256: 414d786b459f0f5d2a731291ef1b870d88176140611ada2eab9f82aaf6e76e23
font_03_sfnt_off00012bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC0 11956 bytes
SHA-256: 6b48124dc518d0fe294690257f0971ed6e64595e084978ee3aa2baf05f5966ec
font_04_sfnt_off000152a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A4 16372 bytes
SHA-256: c0316c603864ddaed24504d2a31ae11b0f55fe3c038ffc558c6289f89c4d3136

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