Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96bee4c671dd8ab…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 07:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 707bb9ea21fc07a17708deb57ce37819 SHA-1: f9a92626c2073b88ffd7f08e447e059793d9f2ef SHA-256: a96bee4c671dd8abd999b0efe1faca5ed841ad7733b4bb062454dee81fac1b59
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags the sample as a link farm on disposable hosting, reinforcing the phishing/malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=lottie+example+android PDF link annotation
    • https://selispin.com/calisma2/files/uploads/13477887791.pdfIn PDF document text
    • https://buzyhub.com/files/36070085497.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/surifunir.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/jokunotelojefiveg.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/52226110531.pdfIn PDF document text
    • http://fastbeatbattlerider.saint-fun.com/assets/upload/files/50355412378.pdfIn PDF document text
    • http://packturf.fr/files/gifikiziranagupodib.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/80936608823.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161336bdb9a0bb---1089005381.pdfIn PDF document text
    • https://iohrp.org/f_files/files/50253900887.pdfIn PDF document text
    • http://usateatop.com/_upload/files/35950101535.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/jujepozilororasubimex.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/busidapizupojivogovida.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/98035663006.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/91386025863.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/webifasex.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/99305578780.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/19162870095.pdfIn PDF document text
    • http://nut-shell.net/upload/files/66960563966.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/50397509627.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/31224486550.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/10108861561.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/14779048680.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/wikeraronoxilobaguxor.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 10444 bytes
SHA-256: e9be901e3c02f0704b5d13d51651158a4e42bced6bf55bce6c7717444fb8f3de
font_01_sfnt_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 17972 bytes
SHA-256: 9737dd91b22881999f5524d617e58c276a6af8326627b632e2e519d03990ffca
font_02_sfnt_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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