Malicious PDF — malware analysis report

Static analysis result for SHA-256 0410e143c5d0545a…

MALICIOUS

PDF

123.1 KB Created: 2021-09-04 07:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a60d2ea9b51aa4dbdca8b4a07240090e SHA-1: de30817177c0f92d106848c6b2b24e68f1fe7a57 SHA-256: 0410e143c5d0545a10123e597d1fc7c3e8e0ecc9ba8c6f9a5fb0a19565637f5b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. Additionally, numerous URLs were extracted, many of which point to compromised websites or link farms, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://ketchas.ru/uplcv?utm_term=camera+mini+dv+manual PDF link annotation
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/pegejufivilusodebegorelaz.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/f90761b305b6f536b1918289dfd85e71/somagi.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/webosataxi.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/kojefi.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/zusiripisujugutow.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b51821661---89420261541.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/69135522879.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/taxisolo.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/dofimetijobagenogiguvel.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210603_7344123FAA98EFA2.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c76f98a3cc4---47907051714.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/29025048221.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/patedojo.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/fuxiv.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ndvao2uageitn7491jibb65s9d/50564242726.pdfIn PDF document text
    • https://curvy.tw/upload/files/buzufuzisovamijibixaweg.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0401a01a2e---pepebesujekudugidigufipu.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/90355376305.pdfIn PDF document text
    • http://qzgj.cn/upload/file/fosirutetodaminuxisukufo.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52186264283.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/wutulevix.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/pr3k6qf15pi1f45a0fjdj2k8t3/48491813409.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a65271d45e75de025b98bbcb09bb87c2/78696686000.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17182 10220 bytes
SHA-256: 8dfc8e065b6f55d01f6d19a96dce90f05ee2fb82936ac5dcb3977cbe1212d599
font_01_sfnt_off0001884e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1884E 24996 bytes
SHA-256: bd0634cdabe12e65c2034b2d4007b26a070ed015d8e1fbc1b5a3bd6724aaa51f
font_02_sfnt_off0001c6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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