Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeeca629f526a7cd…

MALICIOUS

PDF

85.3 KB Created: 2021-08-18 16:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2d6907f9c367438d0a2cbd7398080d4e SHA-1: 18ca174565218c620b33c6a7883a321003308476 SHA-256: aeeca629f526a7cdeed79980988016fe640dfb3d5cd8a0bac57b51cb9cef905a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or exploits, indicating a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 http://cerescommoditiesltd.com/Images_upload/files/40175097492.pdf In PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/97f4ad7e221c793582055298e6f4f094/61452362052.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1bade476d459e89edfd05b9f6393f840/20826191110.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e417997008---88899807043.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092da370d2b4---nibejuniwewukibowud.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/a5880a207dfb6920b59d5054bd33d686/jilizamitogifenakufosuna.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/bodaxesagigog.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/vojarifuwotigetikeb.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/2d9dc79996a0b865e27758e725d2b100/53238201000.pdfIn PDF document text
    • https://slide-bearing.com/d/files/mikan.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/lilukok.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ppikful8lir3v0p5fdfi5lr4i8/likuvi.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/68711693318.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/dexomovakulotusubojijefab.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3c02f7a5cb3b2abd192ed018d3a036ef/76086666376.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfff85a80---raneg.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/gemuwuzadop.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4a6d6fec---vevufokopom.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/mizasupu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/9n7l4fa7770r5m9ksmt8t140ee/62864554780.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/76728163114.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/16043983946.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/nixaduzo.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/30716697922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=hack+swamp+attack+ios+2017PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 17368 bytes
SHA-256: 6ddc9306533e7207b94713d71dd61bb5129c582733c68a0150726427ad98fc6f
font_01_sfnt_off00010cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 1784 bytes
SHA-256: f79e41d964e543aa107eb2e44fe8acb8118beda79d98c9068727fd2537b2739b
font_03_sfnt_off00012d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2F 10664 bytes
SHA-256: 62bbf3e7a08a61e0ea8830ce24021061e0406418ada4041032622a6bf4a88dd8