Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6723601a9f18ac…

MALICIOUS

PDF

83.1 KB Created: 2021-09-08 22:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e9906ac1784f8b90bf9f9b4f5ad1d8d5 SHA-1: 193386f2461cc54268686a4f5ee8d6c3e6cd7634 SHA-256: 0c6723601a9f18ace6d5f9ebfc46462fac8b2c862e3315f428a4e20e9cf8c8b1
196 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains heuristics indicating a social-engineering lure to install a browser extension or update. The document body is heavily obfuscated, but the presence of external URIs and link farms suggests an attempt to redirect the user to malicious sites. No scripts were extracted from this sample, but the overall pattern points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.babetravelling.com/ckfinder/userfiles2/files/xibokewe.pdf In PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ecea296d5ba963d039e7b4df1b6d0169/xasimatujatomegegi.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/38424546179.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/pipiwividosezuxesabib.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/6221120220.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613822297d017---xidivitatosowuwot.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/fabebatokuxutoletonusomi.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161359f2699962---zijepovelalegi.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/zinowadeseloxaweba.pdfIn PDF document text
    • https://citrasas.com/ckfinder/userfiles/files/28423235778.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/12969424044.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/larapamerisezaniz.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109021518097807.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/wezufezifu.pdfIn PDF document text
    • http://lj-group.cn/upload/files/teven.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/59799205289.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/4348560557.pdfIn PDF document text
    • https://alpinashop.bg/files/furajubelipiluz.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/zidakejivutimiju.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/zowewapijegifiwomuzibaju.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138bf1ca3389---xipidimimoborogupejanewup.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/vosexusuvabezibafep.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109061146573205.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/10821903469.pdfIn PDF document text
    • http://yujinpharma.com/upload/files/89676017599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=clear+browser+history+chrome+keyboard+shortcutPDF 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_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 17608 bytes
SHA-256: 232bdd4fcb27a72c67a3f260f164fe4036aa6ab2fc4341eb9f351b593f0dfd72
font_01_sfnt_off00010c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12440 11096 bytes
SHA-256: 1d907cc85fd0bb4fd45e8c3b1f5392b3159c1c95b55e9e7c7372852ae4c2b766

Open this report in the interactive analyzer, or submit your own file for analysis.