Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1f6e78512050c4…

MALICIOUS

PDF

82.4 KB Created: 2021-06-25 16:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 360b3f63e29f525aa4e510ea9d1b0cb0 SHA-1: 29db71d2619c709099a64725dac1121cfd4569a4 SHA-256: 2b1f6e78512050c47bc2e7fdad157e66cc85e09142139660ace58a9ce1096838
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous websites, many hosted on compromised CMS platforms, suggesting an attempt to lure users to malicious sites. The presence of multiple external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/974cfe92a716ebb4e57bc5b2409f445b/44220332671.pdf
    • http://npas.ru/pic/file/97963665354.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b7772d81c9aa45c32297c2d2b565a98d/31786898808.pdf
    • http://romanakladatelstvi.cz/userfiles/file/95317289075.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9dfea9431b5d0945c1c66403559e26a8/38342802876.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/478da097a8171162d81e6754e650f830/27912496719.pdf
    • https://ludifrance.fr/userfiles/file/pitikuxezixarovibupov.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/90535bd14074178f6ec47e274b18b7f8/99244416455.pdf
    • http://metabolit-plus.ru/files/file/lodijojagosigox.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845e1d56c57---31796373030.pdf
    • https://davaocarrental.com/images/file/2629721132.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a597f09b273---nukaxopore.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160916cbe98e7f---zoxadimuneza.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b931de20da1---rotojirazikelizararizik.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/207bf31560b24f0cf96411659ee40ba7/gewarexejudivagakabower.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9831a5492---10164463856.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=whether+vs+either
    • 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_off0000e2de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 16792 bytes
font_01_sfnt_off0000faf4.bin
3366494db99a8c20f18f84b8a4834cc409c8c51cb7ae039a1f9446bcd1fda1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 9832 bytes
font_02_sfnt_off000110b8.bin
987240e24428898da1e9f497e8c64bbfb6e1fb07efeb5b7bfdb4e3d332b72e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110B8 17132 bytes

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