Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ce5be8da909faa…

MALICIOUS

PDF

99.7 KB Created: 2021-06-30 22:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6000315b45ca686fef00187377d12f0 SHA-1: e2c67b0a03ce938cc2db656434134233e6274a34 SHA-256: e6ce5be8da909faa45c63aee17f35dbcf86750d41aaddc717e2cc80dc8bdafc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics indicate the document functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as a lure to download further malicious content, such as other PDFs or executables.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://clear-es.net/yamituki-n/uploads/files/tegegewaweribeke.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac54d564172---81422909926.pdf
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/kijumifuboxewubazixakuju.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a16fd526bfe---ximelelugidoti.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081aac775e5d---2436976711.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/89d0e13d02f3828757879e03a45e41ec/pegixuronifo.pdf
    • https://menu2uplus.com/images/file/48938454163.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8b222f718---tepusazu.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/e7vn30pvfvv5jljl9o5tr3188f/larexusuxutewazolimipedi.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/6450400781.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/1tag10analf41v849s37a8b4h6/20405227307.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/oltb2qgemjjcbf9udm0o7024h1/roburumuganabimifexi.pdf
    • http://krevue.cz/UserFiles/File/10311777803.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e520cf85e---48462545473.pdf
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/gadebabadovasobejiluse.pdf
    • http://heyumpnd.com/userfiles/file///damidovubejirozuperire.pdf
    • http://fitviewer.de/files/file/devikibamisa.pdf
    • https://isabellepieman.com/userfiles/file/15388229548.pdf
    • https://ekransamara.ru/files/rofewiboz.pdf
    • http://baraanduliaptti.org/userfiles/file/kozunejaxibimejefikukaf.pdf
    • http://bacvietexpress.com/upload/userfiles/files/tomix.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8a6609c212b14a740156cf6ee5725ab8/mikili.pdf
    • https://pepinieramontana.ro/ckfinder/userfiles/files/53560260796.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+indus+civilization+by+sir+mortimer+wheeler+pdf
    • 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_off000120e1.bin
a168af9fd9d6e152c23309c5571c0fd2cf95005dba46de4a9d1476fb35791a33
pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 11416 bytes
font_01_sfnt_off00013b88.bin
d7792546ffcdc5c9a792205d74c7716956ac863314ac766d6069c005105b71e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B88 17604 bytes
font_02_sfnt_off000168ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x168FF 16792 bytes