Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2c6324d4c0ff7e…

MALICIOUS

PDF

85.5 KB Created: 2021-09-22 18:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c1a0fc525d7b0094c9184123e88b8444 SHA-1: ef0c38b2f4e4042eb292617d9cb3429ac1a98fe4 SHA-256: cc2c6324d4c0ff7e3694821a6544825828cec9e97b2031b205d774126617e4fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a likely attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attack pattern involving user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/30060288570.pdf In PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210907_FCEBAEB298EECEAD.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/65799366935.pdfIn PDF document text
    • https://shidoremicrosys.com/media/lodepiwe.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/79116765798.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614688f75121e---48239248878.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210909084147.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/2241420072.pdfIn PDF document text
    • http://popmetre.com/news/files/81268638166.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/14572095306.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210916110818.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/37142905495.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/kfi4it72j1reg2h8nou9dc87p2/17547644763.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/86178859969.pdfIn PDF document text
    • https://endobible.com/userfiles/file/95128351013.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/7520930711.pdfIn PDF document text
    • http://seto.cz/uploads/jimudesovimipa.pdfIn PDF document text
    • http://surestegc.org/documentos/file/47497196602.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/sexepak.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/kokunixamekiko.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/fadobopetibusexe.pdfIn PDF document text
    • http://vipdiler.ru/files/file/63801023719.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/612f4628bfa99.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=update+fragment+from+activityPDF 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_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 18284 bytes
SHA-256: 50dc5eaa9bf11a5edf3700792f4751260ff9edde12ce980ff4e06802d3a75116
font_01_sfnt_off000116ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FF 10936 bytes
SHA-256: d27ae6411bfff2fb5fe295030403ec52dc069a861a8a7801004e85b372733559
font_02_sfnt_off0001302c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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