Malicious PDF — malware analysis report

Static analysis result for SHA-256 048826dc700c4ee2…

MALICIOUS

PDF

77.6 KB Created: 2021-09-02 21:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8dbd1ecd6ed36d65709bc274ad2fed9c SHA-1: 2034b9e651d87fd041a6099b941c571117474412 SHA-256: 048826dc700c4ee21bc80afff7f82b523e57d2bd983ce5177950f68d555102a6
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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
  • 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
  • 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 http://changwontour.kr/FileData/ckfinder/files/20210801_20C18242DDDAB97C.pdf In PDF document text
    • https://dm288.rs/slicice/file/derojipexurowezutidafap.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/xeseruluwipozon.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bfe380dd9---20033291814.pdfIn PDF document text
    • http://deltools.com/userfiles/file/65485923017.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210818081500_n3nwkg.pdfIn PDF document text
    • http://vantaibactrungnam.vn/upload/files/14703838590.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/7027985830.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/lisonoluw.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fded59069b5---japanudozenafix.pdfIn PDF document text
    • http://szwygs.com/upload/vilawojopunilexigawes.pdfIn PDF document text
    • http://jngf.cn/files/file/99947695472.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/89937511529.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fa066f0596c---kukebibezunitovapuk.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e426cc0960---ganivutezimibojaxaju.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/fiwariderifarenoxuzafiwo.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8c5b7f5047a8a562e610c673d832491e/40398331606.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/meraxadopanejirirevok.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/70737544722.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c31cf27d4d9---lutofunevupikebekigi.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/57876668176.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16094b99f11b06---lemesesojiwolo.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/jirofesonusixi.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/wurozanetil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=managed+services+in+a+month+3rd+edition+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 18516 bytes
SHA-256: 91f721895089833c86a2cf49744942698b879c0cf593dbb24cadb37c0fd51b45
font_01_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 11252 bytes
SHA-256: 80af2c030a3b128fd5814fe1bcaf063e6e01a4fddd4b07f7e9d70c5b3a46361a

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