Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb932615f2dc69b…

MALICIOUS

PDF

83.6 KB Created: 2021-06-30 07:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 572c6ae5f31d0a003da7590a490c365c SHA-1: 384295953cac723d0af45a2eaa7e5a8bc47f92ba SHA-256: 9fb932615f2dc69b0103b4a53f3ba9f0c4961fe627431d38290986346f8fe9b6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites, potentially for phishing or malware distribution. The presence of 'utm_term=real+iphone+giveaway' in one URL strongly suggests a lure for a giveaway scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • 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://medvor.ru/uplcv?utm_term=real+iphone+giveaway
    • https://infoenergie-loire.org/userfiles/file/nebawadefixuzif.pdf
    • http://zae.me/datafiles/file/pudomilivinex.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eafb12670c415844984f69c264db9a86/55156246535.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d70a699b370798650d759d4f19d4427a/6268183769.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/8ojm3a1rii1rq72pb2f4eei6pk/viwotugetudukixokawowam.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ba9fofkl0arro2f612cgpvqf09/40221152048.pdf
    • http://auldskoolrocks.com/clients/878384/File/dizelizajonokefododuvoxo.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/44837497025.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8da6bbbe4c---nevavezefoduwen.pdf
    • https://weddingitaly.jp/images/file/kixuga.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160941e016a25a---88362775790.pdf
    • http://www.look4job.gr/images/_user_na/file/xepop.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16081cfc054dd4---moxotunogezulome.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/125c7dfaa20293db7f1919c6fb856f15/50933821936.pdf
    • http://adaviestransportltd.com/userfiles/file/pusolajexowojida.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f94eba97c80c2b42ec7b1aff08f5bcab/72127940011.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b8766ec7b---ralogixudav.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/0c454da97a31b7f157827a777fa42b77/korolapaxofidag.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b40ba98a---22865315340.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/48280019734.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1905fcc97629d6a1baf9390b7f43735f/vatuzefetubo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e41f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 16792 bytes
font_01_sfnt_off0000fc31.bin
98aba3f4602e7bf5c6105b83b264ffcb216f7856fb4f183958e497d63663237a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC31 17356 bytes
font_02_sfnt_off00012980.bin
b9720fc8cd39ba9a4baac479bd6287788a75d1c5cfdb2d80a909c72178959e48
pdf-font-stream PDF embedded font (sfnt) at offset 0x12980 10476 bytes