Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eab5b9ca8c8f83…

MALICIOUS

PDF

74.1 KB Created: 2021-09-09 04:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0dca3d61e275d506d616e69ee3753b4 SHA-1: 515bfb9625ee0bd68705f41d2830d58ea7bb02a9 SHA-256: e2eab5b9ca8c8f83f0b9108e25ac3eb10cea216c27801b479aedee1afc711fcc
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, many pointing to potentially disposable hosting, reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://artedelvalle.cl/gal/files/file/direfumepokufutilobop.pdf
    • http://izumrud38.com/ckfinder/userfiles/files/61150249978.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613248c13756d---30913935212.pdf
    • http://icaalliance.org/filespath/files/20210902071550.pdf
    • http://deltools.com/userfiles/file/tekimazos.pdf
    • https://machnik.net/ckfinder/userfiles/files/fupizomesufifef.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/23c6f4798e7550ee83d13cf4768ffc63/xamusegosaxojulegobemiw.pdf
    • https://pasifikendustriyel.com/userfiles/file/33828636399.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130690eab4be---fazolorewi.pdf
    • https://novinfasteners.com/userfiles/file/63437155024.pdf
    • http://manpukulivermore.com/uploads/files/fixofaxexujazudi.pdf
    • http://esen.life/userfiles/file/89102269515.pdf
    • http://bbmeti.it/userfiles/files/19904761549.pdf
    • http://maivietnamesecotati.com/uploads/files/vaginodifimelu.pdf
    • http://uralinteh.com/uploads/files/68781405940.pdf
    • https://100tmt.com/uploadimage/files/20210905202738.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/161327e2ae6b1e---59575356806.pdf
    • http://villaelen.it/userfiles/files/dubabowejogelirosi.pdf
    • https://sindhuinvestment.com/ckfinder/userfiles/files/dopudigevadiwepilufewut.pdf
    • https://jagamimpi.org/contents/files/bupoji.pdf
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95510568695.pdf
    • http://zhatuogz.com/uploadfile/file/fimifezepirobozoziril.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=shareit+download+in+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_off0000bbe0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE0 16792 bytes
font_01_sfnt_off0000d3f7.bin
f3728fbfafcc97213634142bd2b33913aee9aa8088ab19ebfa0a2c51246ab0a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 10576 bytes
font_02_sfnt_off0000ec14.bin
c0b933616ae00f98ab64c7af03bfe127253522c1541c157f94bfeecaac9d999a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 18104 bytes