Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bd514d200e7779…

MALICIOUS

PDF

88.2 KB Created: 2021-07-23 07:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7b6d5a74a9f8452a041b0247abd9bb79 SHA-1: a1fb1ca2ba86a3d19b9bca4d61efd58568550393 SHA-256: 12bd514d200e7779abc498cc899aa9d2d60a9302c623bcda1c2b8b70e12e86c0
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests potential for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://amexeuro.com/an3_Uploads/file/88812515057.pdf In PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b2a0a801---542570746.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/zurizax.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/rowipuwimixufob.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/26491c146140250fe4b1f3fbe3a512a9/dipevofu.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/durof.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/tozubamolaguzilodafexoze.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089710541eb6---ligusugedoxaki.pdfIn PDF document text
    • http://bahsclassof1965.com/clients/1/1d/1db829f64c2e26d3b32b12ccabba4d7c/File/24832071781.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01a97599f8---88026623003.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/29047392922.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/73437671712.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/10879958161.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/02399385a79a351eed3ef2e2d0d5df40/45013204053.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/jurawavimiwuvajit.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/3933792384.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/zatifakufisazajimatorogep.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/pumozuvevejikifewinerem.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/gemosizisuwisipepewebed.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/repemurowesajo.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/mapofegunegadi.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/3c3cffe25c8a0663a7d9e0b33d0adb2f/47593830681.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/jasomunirojebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=paula+deen+net+worth+before+and+afterPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 17132 bytes
SHA-256: c90f3f06e4a139730258d2e279b59055ad54ffb2284d8dbc2367c1edf0980335
font_01_sfnt_off0001222f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222F 10520 bytes
SHA-256: 25f71f30ea09d45162df7ae687a0831d1397ed8cf0eb8e7fe3c1b93d9f14d139
font_02_sfnt_off00013a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1