Malicious PDF — malware analysis report

Static analysis result for SHA-256 9479317a97fe5fc3…

MALICIOUS

PDF

83.6 KB Created: 2021-09-17 17:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 698a003c82727c82d2ba3fc0db264097 SHA-1: ce4ab07d903208be639101626558e6d1299c45b4 SHA-256: 9479317a97fe5fc386c4967cea18e30ba05861e2a14559aa5f12a5e619f69a21
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, some of which host further malicious PDFs, indicating a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=h96+max+software+download PDF link annotation
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/34f7d04325a2d65dda18ed17f4d7500b/fepopapufokumoberaluki.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/66341365011.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbc0aa43ab---bujib.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/4345225803.pdfIn PDF document text
    • http://vitrine-prof.com/files/53767442962.pdfIn PDF document text
    • http://dsfly.com/uploads/files/tefukijer.pdfIn PDF document text
    • https://cartolmania.it/file/31174531182.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/7eb00a8b8301fe5977a113f6aa7ed395/70123378425.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/rerononitexelemelisefex.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/76832779930.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/rasemofol.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133275963fff---36882295462.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/fidudamowepenimazepamap.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/lamirovepova.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-9/20210909175504270218.pdfIn PDF document text
    • http://linyuepharm.com/upload/files/zozewomanidarugubafunepi.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/89814605543.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/90611840288.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/19955658284.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/73891085848.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/63304965004.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/21871953131.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/gedaguzegixoxidafofagi.pdfIn PDF document text
    • https://euforbiabulgaria.gbinvest.net/uploads/pages/files/2292705796.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 18204 bytes
SHA-256: 90812fe22309edc4846327feec400fe76557094b911e814b50869e49adbc46be
font_01_sfnt_off00010fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCC 10940 bytes
SHA-256: 2ebd5234f544dee52840d4e6974c722620465011064501cb3092ef7d5eb7ebcd
font_02_sfnt_off0001292d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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