Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0732deb9b2c9c4…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 04:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 06382dd7adf3967dfd4d58b772be5cd1 SHA-1: 72654cb45908faf9e4b074ae220fabda2af07ca1 SHA-256: 8e0732deb9b2c9c41735bdbe1f97d8e6dcadaa8e595fa01d6c66caadc71284e9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting sites. The primary purpose appears to be directing users to external malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://cameralehiep.com/hinhanh_fckeditor/file/91548096790.pdf In PDF document text
    • http://munnarinfo.in/userfiles/file/moxozupiridafifizona.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/71990413334.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606ead80416ef---92731699193.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/rtabfjd5odfqijstnbs2e7521b/45283893348.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/ganajatizoxunesusa.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/5100195683.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/winukinopinafewujav.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097ab8744739---47549034285.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1f4360bf8---63440888652.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/78831354206.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/noditurowin.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/36c4834a2c9f47ee6e33276855692c0d/47535649929.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/28356876549.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857037262d9---40553502189.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16099cb2848413---metepitabigatedapabe.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/variremafe.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e171401d8---betoguxu.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/pigifewavavugasubog.pdfIn PDF document text
    • http://xtra360.net/campannas/file/13204536030.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/7c9569f4d7710d078a35c5da783c3e37/fotegewepozoxuju.pdfIn PDF document text
    • http://ktcz.eu/files/files/2722609173.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30c74af9d1---17726593276.pdfIn PDF document text
    • https://artbynela.com/uploads/file/60997358975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=moonstone+in+witchcraftPDF 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_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 10464 bytes
SHA-256: f0e59cc4964f0b5a1578701c3b754e53a51cdb4096ebd808fcd69fa2bba76773
font_01_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 16752 bytes
SHA-256: b38c8fa21535701954cbf8dd5311361301d8704f2731c80ea5dd96cb1dd373bf