Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c34c54170eee3c…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 17:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fb8e1a3fefd58218fee69a6a3be05b5 SHA-1: bd82de32a8fbad8ef48a0f50d71071e771894acd SHA-256: e1c34c54170eee3cc28a38f6f4f24cb84e9aad8aefd185ea6d04bbf02e1f4fae
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dda307c560---nuxuvelow.pdf
    • http://webinaris.net/ckfinder/userfiles/publics/files/99362511715.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751721bc27b---rafiredawadolipakefota.pdf
    • https://estoniapools.com/contents//files/jufurisi.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a623aacac3b---rugexugafototemide.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0367816150---22118727995.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0b18423f413508b4d9268792587e5d45/8196495443.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607441b5e863f---82431849295.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/4dof786ntstgtvb35fngsmic90/2559804421.pdf
    • http://vodnik48.ru/content/file/76849293670.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/b277dd8a08c74c9ad44f23ace75a933e/85701752613.pdf
    • http://aj-logistics.com/stock/userfiles/file/vepoluwixusuwajo.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/nejiz.pdf
    • http://hainescentreasia.com/images/file/viwer.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc3dc67e90---suzexepobuxigonabe.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/1c1339a46ab51fc63a53175182994bc9/26462719865.pdf
    • http://agendatourvietnam.com/hinhanh/file/tanoxefex.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2369cd02---lesisavisuji.pdf
    • https://fnb-concepts.com/images/uploads/files/96164202090.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1beb99865---fufitomubodomifej.pdf
    • https://malashealthcare.com/userfiles/files/saveruloladeridono.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe1f5d483---welowukotatuduzonitixelop.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/260aea802f09227e4995ccd0e9252533/79018325780.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cute+baby+girl+images+for+dp
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/13ee662fd0bc65bcc3a3680f946e421e/xegabexobomep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea31.bin
40928c25bc57924ad667a21bd91fae5411cb524947097178bd63078405951b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 11120 bytes
font_01_sfnt_off000103d0.bin
051a26c055f9d57de2bc551ab348d18269c43b8a176be054d0b5d5fc7d254e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 16836 bytes
font_02_sfnt_off00012fc9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 16792 bytes

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