Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e6b9d7df5bb74a…

MALICIOUS

PDF

84.9 KB Created: 2021-09-24 11:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 94ad907e572aa5c7498ee3b9c49ec96f SHA-1: 7596af8f7c22d6e65ba2e0108260c63f89d84ddb SHA-256: 95e6b9d7df5bb74a708c3d367748184681b1f638bd001cae2de90006ba133ff8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggests it functions as a link farm. These links likely lead to phishing sites or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://smidgel.ru/uplcv?utm_term=iptv+smarters+on+chromecast PDF link annotation
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613194a45a068---nevukimupimanokekif.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/50847758926.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/84092117369.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/6140976367.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140cfa464f60---wixajo.pdfIn macro / runtime command snippet
    • https://office-agglo-larochelle.fr/userfiles/file/wijoxasonuzimax.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/lupenededaba.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/d7b60a8eb9fe33ba05b4354c7430e03b/31624199335.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qolhe0ct66qpqeftcdvf02l0oo/luwowimariguv.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/71321562427.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62209536493.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614631f49f493---tujifokajowatav.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/wopuxuzid.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/xolexegosumolokusejopi.pdfIn PDF document text
    • http://domuran.pl/files/file/73878400213.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/gixesija.pdfIn PDF document text
    • http://deforma.it/userfiles/files/jakukufexagogeza.pdfIn PDF document text
    • https://sujatasfoodopolis.com/ckfinder/userfiles/files/69385387633.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/27314427495.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/jibupojibaludib.pdfIn PDF document text
    • https://memo-log.com/userfiles/file/livakemagakes.pdfIn PDF document text
    • http://scpt.it/userfiles/files/pedobux.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/baferapefetadazudupewus.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/20781609894.pdfIn PDF document text
    • http://maasmartcity.comIn macro / runtime command snippet
    • 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_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 19648 bytes
SHA-256: 8e9357b0ddf4b182d307e0314b0eddf3e4e2d62e58f7749dcdad36b976a9f4a3
font_01_sfnt_off000115cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CD 10516 bytes
SHA-256: 8c66da96db706da2e62e09dca6195d6bd6bcf2c24c595d7c54f6d533a8335ffc
font_02_sfnt_off00012d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1