Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad2d1028a1610bf…

MALICIOUS

PDF

85.6 KB Created: 2021-09-03 21:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 267d5db1d94777f73807a41fbe3c1474 SHA-1: a7cbc2041b9e91eb4a2875b4de78a1a7f6a37eb7 SHA-256: 1ad2d1028a1610bf96547021c314ef344be4af60f562f534b75480fd501d1be6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also contains numerous external URIs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/jovop6f1mudrjoqb74scrmscb4/3543154443.pdf In PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/7c3473a40872b357b27e4efbf6c95869/83996932527.pdfIn PDF document text
    • http://domplus.su/userfiles/files/nokalotumoneji.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612e4e4562db1---76635257040.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/92822343814.pdfIn PDF document text
    • https://limsurdua.com/contents//files/zupesakaxusujajavizonugog.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/91064774133.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/36174a298db67608c1da357509e12e87/bakojexijubukadozimakiw.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/wuvagoxi.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/soxupemunumukuk.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/pesiwenarifogum.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/30493456215.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9295a4f5459fa4abd4795f0ce3f0a207/31998664726.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/43139885154.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1141cccea2---gesozakomedek.pdfIn PDF document text
    • https://palet-school.com/files/files/10442183079.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/gilumubemew.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130f8987cb01---50905212037.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/remakekasotim.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a11a4629e88fc19297a048786a645ec8/vowuzasuj.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/ridojegimedosezij.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/sunajozevofunor.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/61166795971.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/xonedozukitama.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086053be880a---ruxukokegoxoxizunefe.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b86622d4---juxopisaluni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=child+development+pdf+in+gujaratiPDF 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_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10018 17908 bytes
SHA-256: 27be2bcee7e9c0343bf676549f86e57d129730d84851b3f80e50a5819672a31f
font_02_sfnt_off00012f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F02 11104 bytes
SHA-256: c301f81c18f7454b3f70544d275fc4a92f923818882fa5523b396ff8fd9a0f24

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