Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebc0692429bdbbd…

MALICIOUS

PDF

86.1 KB Created: 2021-07-18 16:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92532083fedcbfc21d6eac99bdd458ef SHA-1: 7edb3bf076c20dfd952e7100ab62bad7c5284c40 SHA-256: 2ebc0692429bdbbde660bfe383b03519b767ecd62af044495212f2d71e015306
96 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various compromised WordPress sites, specifically leveraging the 'formcraft' plugin for file uploads. This suggests the document is primarily a link farm, potentially for SEO manipulation or to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f43eb91ac1---29107688178.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160814517df0a0---29283862497.pdf
    • http://coinproject.com/userfiles/image/file/8676271718.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb5fa38cfc---jodekifopefazog.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/a89e41ca963fe502474525f626cdf7ef/wesamopakabuge.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd42bbd70---dekanokibulawoxetefogew.pdf
    • https://jxloanchien.com/style/postimage/file/fisexoxulaluganazakiri.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b998131312---vazorojudevesiwiwedosapef.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083d50729c93---10957467903.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089a161df011---9652779755.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b5de42ad6---nozuduxudarizibelawazezuw.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/91773986978.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/49805b98bddf770da67129408f9f1472/lidajasonafizasuwedaze.pdf
    • https://actorconseil.com/files/file/godivakologixite.pdf
    • https://andana.us/files/files/75613681271.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaa6814f24---mibogezamozomifajos.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/2eb06d5b36fed652d6f96dde9d60408c/9015123443.pdf
    • https://iamtimeshare.com/userfiles/file/roxuzumesulaxun.pdf
    • https://bnbcostaverde.it/userfiles/file/20530763784.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072490dca4ff---vadibadilikamebusonera.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/higbj0koidrp6sd3uiih3825b2/relinorogetip.pdf
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/16334743762.pdf
    • http://hpworld.hu/data/pic/Image/file/8109750557.pdf
    • http://ridendo.cz/files/file/giken.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=periodic+table+with+electronic+configuration+of+elements
    • 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_off0000eb71.bin
6303929d9aa6a85037b10d44f889f57202e2d8cfd1f685cc4da3e872eff86073
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 17172 bytes
font_01_sfnt_off00011839.bin
e97b9702258fd2541167700e652dff6d8931137c9568d064ec77284505184047
pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 11248 bytes
font_02_sfnt_off00013240.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13240 16792 bytes