Malicious PDF — malware analysis report

Static analysis result for SHA-256 e700710663b4410c…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 05:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da2a7273e5901d83192e6019e5beccb3 SHA-1: 4379c3098e1cd050760342646f1e5c29595047dd SHA-256: e700710663b4410ca4c9db95917c686fe694be08e5453d055adf02de79b87b25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to numerous URLs, several of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cs-web-design.de/ablage/userfiles/files/xolabasamiji.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16152710edbfc5---74908136857.pdf
    • https://mycocoa.org/images/upload/files/41939186213.pdf
    • https://www.puskinas.lt/ckfinder/userfiles/files/naxapelabawibomop.pdf
    • https://camgloberealtor.com/userfiles/file/85631801904.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/kixugosiviwetolapo.pdf
    • http://idealthailand.com/file_media/file_image/file/xewudexixe.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614b818106f3a---14280827742.pdf
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/23225413910.pdf
    • https://studiovizia.com/webroot/img/content/files/91359991480.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/85305480253.pdf
    • https://bbpartner.cz/userfiles/file/wesogolepulonodoko.pdf
    • http://vedepcuaem.com/luutru/files/gobajebekaluw.pdf
    • http://pilatesmystyle.com/userfiles/files/padamojotukavuvaned.pdf
    • http://encino.ilovepokebar.com/uploads/files/58114878006.pdf
    • http://cleanking.net/userData/board/file/25265644882.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b6f7b369997e3f6e1926f00402b7dde6/29030884906.pdf
    • http://navigator-nsk.ru/userfiles/file/xulirabagojopug.pdf
    • http://panel2conso.com/userfiles/file/26910282041.pdf
    • https://monographie.com/ckfinder/userfiles/files/dakapaminifa.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f74acce15e---madaz.pdf
    • http://videotour24.com/data/fckupload/file/buvudib.pdf
    • http://mfcpavpos.ru/file/49739140961.pdf
    • http://gojjang.com/uploads/files/32645457169.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ced693d17---zobawolufosupaf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=tekken+4+android+apk
    • 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_off0000b3d1.bin
8c76fcc6ebaa4d6a27577a07d26a9f08c3bad5d521b54413bf19780dd0db1e51
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D1 14564 bytes
font_01_sfnt_off0000d86a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 16792 bytes
font_02_sfnt_off0000f081.bin
79ad3011e9a487c6c9feb8b3ec0d385f921fbe32a244c5ec798eb2c516269d35
pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 10204 bytes