Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeb2c87888ab753…

MALICIOUS

PDF

77.0 KB Created: 2021-09-19 21:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d95edb8f725ca80a78d7aa83237a0b0d SHA-1: c69b8d0872f53f1f96a01e8a89e73e53f7f0d42c SHA-256: 2eeb2c87888ab753add04a38abcb1325eaf8a85fe8f3497dbd97cf496985a751
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of a URL with 'burger king app android download apk' in the UTM term indicates a lure for potentially unwanted or malicious applications. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=burger+king+app+android+download+apk PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1thh1hvvaqbq8j9l45svf144a3/pivirarubifidobaluf.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/10689441685.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/fonuvabuxuretoxi.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/8586659782.pdfIn PDF document text
    • http://erictex.com/ufiles/files/12636332022.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/kogutu.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/tonofidalororug.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/25131258070.pdfIn PDF document text
    • http://philboyd.com/23439280854.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/vojijiniralowavudefa.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161356f007cc21---53933339177.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/zimajapakiwipedona.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/66252421140.pdfIn PDF document text
    • https://grandegroup.net/files/15853392595.pdfIn PDF document text
    • https://uangraja.com/contents/files/92682000440.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/sisujeradutiwilajapuki.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/jixivevuvaxematejuzozili.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/tirem.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/20852679419.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613984b953911---vusedukimukedalowaziwa.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/5448085764.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d9e9d114d---98375476276.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/vudizomupi.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/58790f4bb8d83c8698518a2eb991ee60/ninefisowiga.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/67567393089.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_off0000c849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC849 17532 bytes
SHA-256: e305887a9e08f8fa00f0e13a24879e460f7918de4e865b57725160e765661bf9
font_01_sfnt_off0000f5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 10632 bytes
SHA-256: 25b7bc985f029866ef8fe5f12ad7d6c6e59b5b7cf33bb23de6884002cf90720d
font_02_sfnt_off00010e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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