Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2cd87b56912493…

MALICIOUS

PDF

74.8 KB Created: 2021-09-02 12:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a9db7f6cdd403817a111b87e41db3e11 SHA-1: fcab6aa65350ea1c1412ad83df61011d379d5d5c SHA-256: ed2cd87b56912493bba3ee1ebdfe34907df29407185a90acae471dfac46ca493
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kxqcgs.net/filespath/files/20210809015229.pdf In PDF document text
    • http://meadescafe.com/userfiles/file/42944171310.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/66293616206.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/44272822712.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/96925649921.pdfIn PDF document text
    • http://lphs-the60s.com/clients/5/5a/5a84a5cabe7f31a06b4bf99f7e1b7ad6/File/nuwelipexokebesanegiwuxe.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/a7c49164b09f821c335f46cc617294d8/53557922622.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/27cd1b742b938f9510aacb59335de1ce/namasajokafed.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/52321590646.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a96cc35a---xotovibamitiwawaxokil.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/862befc3240ae850874dc266849ed18f/sofesanokijigefimo.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/kelukikosaluxowusexuved.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/zikazisakage.pdfIn PDF document text
    • http://autothudo.vn/upload/fck/file/44520837344.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/fagelosumixogasi.pdfIn PDF document text
    • http://4bx.pl/public/file/rijepeloxobutixe.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a9e80cf2c7e52447c9f53fc228e720ec/19205813257.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cf0e5217e---poxapobaniwatipokekat.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/49c32k3l8362fflbciouhem872/budowitofozezuv.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d88beab3ef75886056c090f7a09923ec/42971828950.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab19242df95---dibubese.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/zodexu.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/19418252778.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/12979520859.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/17387855841.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/ketoxokuj.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/55927820172.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/008a9408e5d285c7c8c3a4ac8587c0b6/gilupodolepivekezozir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=glacier+bay+led+faucet+manualPDF 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_off0000bf40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD757 10740 bytes
SHA-256: 25afa55dbaa9ba632083dc0a089c27da99e11996752a0352cd2a84628f66d58e
font_02_sfnt_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 17724 bytes
SHA-256: ef84eed988e853e5ddb268e282a517caa34c7e37ede9b0eb0f5b1c966ed591bf

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