Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaad67f96cccd67…

MALICIOUS

PDF

71.8 KB Created: 2022-06-05 18:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: d8b658c37f7af5793d16620ec2ea1b60 SHA-1: 5e4aedcf8015ca98f65eea175e9951f7bf0b2d00 SHA-256: 8eaad67f96cccd678b258996f3197e435c528600bbcc9669769fc4f3f94bd0df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. The embedded URL heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://loheb.co.za/YmrXLWy8?keyword=apples%20to%20apples%20quick%20start%20instructions%20pdf%20online%20download
    • https://vatlieuxanh.vn/resources/uploads/files/razuse.pdf
    • http://a-xian-coat.com/uploads/files/202204232126063045.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/31981260771.pdf
    • https://yuanyoujie.vip/userfiles/file/xivetimuxadav.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/iibitp1kna80bfd34vgcif1b97/dujijivewekolotaluzelugo.pdf
    • http://isisthailand.org/file_media/file_image/file/514818850.pdf
    • https://bafejaligaxe.weebly.com/uploads/1/3/4/0/134018432/1351555.pdf
    • https://ranepudanaliv.weebly.com/uploads/1/3/4/0/134000181/4949967.pdf
    • https://aydin-elektrik.com/resimler/files/xepesat.pdf
    • https://vamowupa.weebly.com/uploads/1/3/4/4/134435661/ginilo_jukatobeziteruj.pdf
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/vezatimanenoxoki.pdf
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/zanan.pdf
    • https://newefogaf.weebly.com/uploads/1/4/1/4/141469919/6bd1d23cb401.pdf
    • http://homesunshinepharma.com/upload/files/3510142702.pdf
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/fagadidenasoletijeza.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1623c31a88249a---jumurenudexug.pdf
    • http://progettocecinacuore.it/writable/public/userfiles/file/91405895057.pdf
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/jodixiwofizako_jidesezikaket.pdf
    • http://geasit.it/userfiles/files/lojukebijesaxajibuxuw.pdf
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/58517490911.pdf
    • https://vialivonica.eu/userfiles/files/798971941.pdf
    • https://tonicsuitemusic.com/userfiles/files/xomuso.pdf
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/fidodiw-modaga-sokonesut-dagudawigifidi.pdf
    • https://loxojewumiv.weebly.com/uploads/1/3/4/6/134651611/tugonoxulage-fifofaworoduji-xitoxexujuna.pdf
    • https://morekifozolil.weebly.com/uploads/1/3/4/3/134332894/paxakoruzar_sifejilezefem_ladomexepovir.pdf
    • https://luzuredero.weebly.com/uploads/1/3/4/0/134016924/300097.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e3.bin
3b20ae6421e2fe895da4bafc4a799f0243e504dff854381da7622d58d85e2c09
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E3 11020 bytes
font_01_sfnt_off0000cb84.bin
5a2d5f5c547b27f7837d9b86b46d8846eca645a283434aacee5f34959b42ea60
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB84 17312 bytes
font_02_sfnt_off0000f8d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 16792 bytes