Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee387bff409e2fac…

MALICIOUS

PDF

87.9 KB Created: 2021-06-25 12:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24331ec3973fbd9f5ca3bd3302edff5e SHA-1: 552947a17758416f17ceb66235a15faeb01efb04 SHA-256: ee387bff409e2fac488cfdc58645ce6bb00be69479f4f234032dae0ea6e97cc5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious content. The presence of a 'download' button lure further supports a malicious intent to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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 http://prmakeup.com/Image/files/66496828882.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/uaamcvnnetjkt9kkaa4hi59005/dofikiba.pdf
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/89019362472.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e7229f6d5---5124600681.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de6ca4a41---44345799812.pdf
    • https://vivekanandbawwa.com/userfiles/file/kedojiwo.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090953f8d7c8---perifonedulinaturo.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/v5uuk0iqqr1jakhlkpksa0b13d/liwovumuwitutinobokebebi.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/lkbuug444jjdhf0fc4lss133so/wogizalunageselon.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a884010a443---71062992578.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf93b179abc---widure.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d02914fa2---71446783665.pdf
    • http://castrolmintabolt.hu/images/upload/file/33641937900.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d99d5cd43---96507787800.pdf
    • http://hoshitorionline.com/uploads/files/43505674836.pdf
    • https://aduanaldelvalle.com/userfiles/file/lixixopovi.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607eba5f9f352---dibemiwukesulabol.pdf
    • http://bpabv.nl/uploadfiles/file/16814024560.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=boron+physiology+3rd+edition+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_off0000ec12.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 16792 bytes
font_01_sfnt_off00010424.bin
696274806f51e98d636dcbc9123df4b1d79a6c47d3415aaf8fc1946ab564a1fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 20424 bytes
font_02_sfnt_off000137c6.bin
d8052b15f1dc1feea9b840b649c89a3d757acc3bb8608163ba7d22e22e2e76d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x137C6 10956 bytes