Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca5fc30bcd2e233…

MALICIOUS

PDF

88.8 KB Created: 2021-09-14 05:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 954c37e72e10ac399e1c4b8df05eb230 SHA-1: be7f4d711f55072738946a95016e74798d84825d SHA-256: 3ca5fc30bcd2e2332e54afe3da1bb201123671f37b4fa84601394cc49f338a1b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves tricking users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/6703df7b086b5b7924a05d03dc3b3fc8/58103884195.pdf In PDF document text
    • http://smeeing.com/userfiles/files/14776809327.pdfIn PDF document text
    • https://airxps.com/userfiles/files/55679654561.pdfIn PDF document text
    • https://rotitelor.com/contents/files/repekowuwinuk.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/81767371913.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/3250610966.pdfIn PDF document text
    • http://xprchemical.com/upload/files/wegubedekuxitoligodigupu.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/23829067630.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/73170121580.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf0e44723---wupatomukepizopa.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/82577929965.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/74752747603.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ab69cceb65b9101f30e31a7a74a60b45/topemidoxef.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/16325218691.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/gogukovos.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/selagosurenebabivejob.pdfIn PDF document text
    • https://razredna-nastava.net/files/rifuwuzagopajobap.pdfIn PDF document text
    • https://majubesar.org/contents/files/jotuwileruxaletunare.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/zusanidefipep.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/32233548066.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210906232130.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/katikube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+return+of+sherlock+holmes+pdfPDF link annotation
    • 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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 19176 bytes
SHA-256: 2eccdd78a51569ab7c5e165825ddcfba5d16d90893b44643e95e8bea9f1b7c30
font_01_sfnt_off00012529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D40 10788 bytes
SHA-256: 9b6be6d28c60acc7cec4a4cc3255258c3b694ad81294291b3cbcbe5aec2b18dd