Malicious PDF — malware analysis report

Static analysis result for SHA-256 397e20f2a0935ebf…

MALICIOUS

PDF

85.8 KB Created: 2021-09-04 12:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7cb50bd2b9967453cec4eba52e6c448d SHA-1: 2a00e783e09659ad9b11f9339e6fb712ad1bc1b5 SHA-256: 397e20f2a0935ebf4486e893e9dfd1a6c3db0673339b3b47ac795b71d85e8bbb
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of multiple links on disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d52f6efca---2304856461.pdf In PDF document text
    • http://mhinflatable.com/upload/file/60588124442.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/talijegotavutina.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1ef2da29bf997f8dd20d6f38fe11da8b/lipejapupuvurapas.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/65407313977.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/napozipatolewusem.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/sasanetavuwumasesolununu.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/84744478046.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b221c4b3c4e---70395466805.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/55139827109.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c85b81ec75---misimimidojerajupisenemo.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2f4535da8---66161917215.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612137c56ddd7---83646900115.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/ee65a00924990e60994b5ea6d7446a74/19309803502.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/zawagogarixulumi.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/sabuzutoraweke.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/5535881451.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/f38s6mq4sm3v88tml7elftpur2/89055662471.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/50738682522.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/4djiubq8f92eesliskn80uk84f/domopabajoroselape.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612cd4127bb66---366482737.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/39322822180.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/dotetozapadopatoga.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/12166023770.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=liste+d%27adjectifs+descriptifs+pdfPDF 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_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 10464 bytes
SHA-256: 320417febfa8e45806f630d9fce19d03569abd40d1f4c4623f3fb4adcea067b5
font_01_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 20052 bytes
SHA-256: 861f7a06adfde9b9e9e619dd5925e4571780b95bfbb92cb5ad969dcb4e5bcbf4
font_02_sfnt_off00012f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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