Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4789bcc806a1d4…

MALICIOUS

PDF

92.9 KB Created: 2021-08-04 06:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98f00356dfb42d605c89fcc6ffa463b5 SHA-1: c77142ec736b07a0fc9078d5a5e2f1073e9e6573 SHA-256: ee4789bcc806a1d48ae9694e1b48a1dfdf13c270ea44e3c503b8acfb2aaf2026
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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.
  • 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://xtra360.net/campannas/file/kesazagogas.pdf
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/bevevolejapodisipal.pdf
    • https://theatresaucinema.fr/uploads/file/6677057219.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54214c38b---dorimiguxosekenibokiki.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/cc4f37aca6112a3a2c11d5e2ea6a22b3/8912128394.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/gilodowebisojazu.pdf
    • http://kimhoatra.vn/upload/fckimagesfile/44805824798.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/37471342731.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/8fl4i4bs4bgr8v35mbgao9b94u/zegezevuxidufiso.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b698e33dc---punezasewilu.pdf
    • http://korea-labels.com/ckfinder/userfiles/files/87533115341.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/rc6r4bd30076sloh4njatbv5b4/jopevesajotinafefi.pdf
    • http://brenna-ski.pl/userfiles/file/kamunugeze.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/kqv3dfolbqrekg3869e94h5ebq/wurimogapalaxexevosuniwe.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866a5a8a7f4---baruwuroro.pdf
    • http://afghansolar.com/userfiles/file/tawusiwapuk.pdf
    • http://yachtandgulet.com/userfiles/file/rolagovixuvefegipo.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e0363e88f---91059192449.pdf
    • http://cachnhietwin.com/luutru/files/63954362152.pdf
    • http://parkhighclassof60.com/clients/871169/File/41544304736.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/019c403d8ee163a8eb0d0f9ff82229eb/63759950250.pdf
    • http://www.annaleehuber.com/content_files/file/82054794078.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=libro+de+f%C3%ADsica+2+de+secundaria+editorial+castillo+2018+pdf+completo
    • 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_off0001005b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 16792 bytes
font_01_sfnt_off00011872.bin
b82caba8ff8954d7c26269ba7fe74ac26161db1c8992611a65666acd104d7bcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 11544 bytes
font_02_sfnt_off000133a3.bin
27d786873b4dfbef10895f9f81a8df9e3a30126e16c26e621f56d744287ffa91
pdf-font-stream PDF embedded font (sfnt) at offset 0x133A3 18476 bytes