Malicious PDF — malware analysis report

Static analysis result for SHA-256 f225d6c718071d52…

MALICIOUS

PDF

79.8 KB Created: 2021-09-21 14:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b0023f0df6a18251beac83fc0f264ee2 SHA-1: 80cf163f55b896343a8db67743dedb19ff80ac6e SHA-256: f225d6c718071d5259e417d162375a919241dd98c9034b5caa15dbd5ba6d3b9b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or redirection attempt. ClamAV detection and ML classification strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. The presence of multiple external links and the 'link farm' heuristic point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=he%27s+able+lyrics+by+darwin+hobbs PDF link annotation
    • https://gbp.dropship-online.com/userfiles/files/31470268586.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/zobogawofodejikugog.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/d31df6fe33fe0a659b75c29690791cfa/20228619688.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/waderubadosa.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/womobemixaki.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/tipob.pdfIn PDF document text
    • https://irantruck.ir/data/file/kujowusawajari.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/bidagezaxujepajokekew.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/26101469474.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/64609539755.pdfIn PDF document text
    • http://baoveantam.info/upload/files/82656080662.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/pipotazowuw.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/nuzosezawakeg.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/sovezulelokebitusarilet.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1630861171.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/gasujufipipugof.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62237507538.pdfIn PDF document text
    • http://kientam.info/uploads/userfiles/file/19597397307.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/degurafibekubafigode.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/75409718952.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/45759693199.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/zoraxavunekezuwovogam.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_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 10736 bytes
SHA-256: f60baee9eb4b26ce95af7fe01779c80e2638c63f72ddf8e75be49fb6fe0af246
font_01_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 17324 bytes
SHA-256: 506ab451af5da5e3e6c18865d05b88a648b35127965f1209edd5d176cdc9203d
font_02_sfnt_off00011929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11929 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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