Malicious PDF — malware analysis report

Static analysis result for SHA-256 124dc1c0224158f2…

MALICIOUS

PDF

84.6 KB Created: 2021-09-01 08:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e2c99ca3165dbaab655c32a183324fca SHA-1: c9a26ff169efece72b17c7734db888eb254b507b SHA-256: 124dc1c0224158f2ccead40cb7c8ada38457d1197843e9878bb9e4493d26272c
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a large number of links on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://archism.ru/uplcv?utm_term=queens+of+the+stone+age+lullabies+to+paralyze+songs PDF link annotation
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ls6l45pnhns88pd51ssneg3u72/xorivopapogifap.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/91716707325.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/fejakopufirijudovazi.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/91132727887.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/xozibepu.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/83461321253.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da367ec8f58---xamanipokoj.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/27461390679.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b559518a523---vinutixoj.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1672b6d30---bojumu.pdfIn PDF document text
    • https://daismene.it/file/kivobomamagoki.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b5a2ada8b---31730273962.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c723c5dac2---23248318732.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6b822b5c---33482901391.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/nakabunemolelurunuxoboro.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/tibatozika.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/86211301587.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/pl8gualu447pl9bbbsk9sii6bj/resavigevewuseripotukuna.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160bc21fd21ac9---5873833092.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/51589684680.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a5edb1951d4---33162532828.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/75326362757.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16129e4f288704---felisoregejudilube.pdfIn PDF document text
    • 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_off0000e412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 11112 bytes
SHA-256: 93537e30fb9632f12e8f8edeefdbfc35307903ac14060d3a63aa4d03bb4e719a
font_02_sfnt_off000115f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F2 17616 bytes
SHA-256: c4fbd8dc6658e4956f39ac2ab719e0b2997baa980c90c12d9490974f6851a00f

Open this report in the interactive analyzer, or submit your own file for analysis.