Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27d0914a6c37252…

MALICIOUS

PDF

84.1 KB Created: 2021-09-20 19:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: da331e5f796dc524446e8becc2ab4a1b SHA-1: f26dce63d131e3429d9d2d059eee38d0956f32d0 SHA-256: e27d0914a6c372520f2a0d1a6b4d16bc9dfab354a7adaa7e8098c703e65361a6
196 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high ML score and ClamAV detection, indicating malicious intent. The 'Remote-support tool lure' heuristic strongly suggests the document's purpose is to trick the user into installing or running such software. While no scripts were directly extracted, the presence of numerous embedded URLs, many pointing to potentially compromised or disposable hosting, supports the attack pattern of phishing or social engineering to deliver a payload. The document's structure and embedded links are consistent with a phishing campaign aiming to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://xutricolor.com/uploadfile/files/wirijonowidozes.pdf In PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tewirusedovo.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/samexutasuboza.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/87330896302.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/jobesekuzebakigitizalina.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/253b83cba7f608965916249fc9468c9a/jisewusosati.pdfIn PDF document text
    • http://masonhn.com/d/files/bipuwevemexuv.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/topopuxewibudet.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/55735901956.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/gezuwesejekawoxuzesar.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/naxemazavefoso.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/68930131440.pdfIn PDF document text
    • http://clerus.hu/files/file/37404680591.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/pejowemomarejutu.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16130cb9074666---dejeko.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146b90e35467---15225616196.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/47761039077.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614832e46b2e1---53857714194.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/161405934383ce---85784456135.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/pabaviwibenubolaribat.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/88675331806.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210906_B154E0960BA353E7.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+download+gta+san+andreas+in+android+mobilePDF 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_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 10808 bytes
SHA-256: 7d3008397138f905a76e8c79906f4d3b652e098deed9cad3fa91d7660e7db843
font_01_sfnt_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 17496 bytes
SHA-256: 62a660a5ba04fda37b86b89968c3e8245baea578be731299f920d5c75bd87edd
font_02_sfnt_off00012a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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