Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba652265685b5618…

MALICIOUS

PDF

80.8 KB Created: 2021-09-06 16:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a984185b50d4fea8879ae8931cb9cff SHA-1: b0bb4bf34cd4b15f5ac8669f0ede13468abf8b44 SHA-256: ba652265685b5618b7cf642fda178525bdce84f9dc5a856e4d7aff75cccaba88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The embedded URLs, such as 'https://oniceh.ru/uplcv?utm_term=come+modificare+un+pdf+online+gratis', suggest a phishing or scam lure, likely attempting to trick users into visiting these sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=come+modificare+un+pdf+online+gratis PDF link annotation
    • http://gancza.pl/userfiles/file/lewelusibowivedixale.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/ba248839ece40bd3302e3ac9dfca72f2/kifisujesanira.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/323d950f7c8183bd1a51d9415da2e5ac/samesegavopixesafagutot.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/92678523240.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/069a46dba4be24b01106783d3c5035cc/35571858448.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4b448b63c---48049887208.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/rosadisetenemoxedobomof.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210613105138.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160baf31110924---kurufejexitabure.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/kakexuwitudoxoza.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/98235082029.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084a7aac4b59---89621448334.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160825c4493988---12054854099.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210825_A90363D74050DC8F.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd775f2c3---65281799048.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/43146775391.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724617a0efe---45946877048.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/6e8b4e855128daee77ad928c14084fbf/98841001065.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/39stjubcktrh3iqgd5k65ed8tr/vuzerewexufovozozajos.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/98433058652.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7012f3c17---30893678461.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/75943666069.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/53639554510.pdfIn PDF document text
    • http://orem.mn/uploads/files/welinazukem.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/28062757483.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_off0000d7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E6 17164 bytes
SHA-256: 2d684b80933848ccaa14e98a9b22c7a27b7b39177d5c10674e86b8b87d711328
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 11092 bytes
SHA-256: 2f2b4b16a48cb3b0e3a44cd146a210515a172b88a8456195ac30190d6aad360f

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