Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2c69071eb74e41…

MALICIOUS

PDF

141.7 KB Created: 2021-09-07 11:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6959e774af29c61bd825b8bffbb9a4e2 SHA-1: 578a0203e752d4d3e387c31dacd53b3a6d3fd0c3 SHA-256: bb2c69071eb74e41f127dd3fd5db082125cd478b0b895afbbb7d1aaa1526d504
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. The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external URIs and the nature of the link farm indicate an attempt to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://chcial.ru/uplcv?utm_term=trombone+tuba+duet+pdf PDF link annotation
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb9191bca59---gotasemora.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/xilowaxisuni.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca4d6640f5---jemivopebup.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/arehap94n6dags2v21sfop7fcg/55676128010.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/zemabagikimidek.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/afde792f0d649da072773da875ecd94e/24686400780.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/xopibuwudezujosakon.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/941e2ea0b7a9400f91739bd5652617ab/58041171024.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a36c2a8f5bb---duxumenujex.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/14215771601.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/85144046698.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/28c284517948e7dbe67195982c910624/2393830788.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/bamajebetibit.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/18992c5cba58b77af5d06a4fa31d89a3/42310961936.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/53708282077.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/9bc70effbb2025d3b1a9518d41d81745/78846937305.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/93090086660.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/pve4r5krb976ob6biim6l2brv7/webesoxigerovara.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/88683434311.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1609666cc29bee---fununifekurepemisex.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba74f40e421---wewikuvasofamuvisajilo.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/geduzigobowet.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/tatalorexowodamokojumamu.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/ea3172158b0122119ffdf25edff906e2/96322852609.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/49922331750.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_off0001c0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0C8 20948 bytes
SHA-256: 3dae51444de1e47a655ae8c2de491c67507318fb9964b80fa509bcb30ea26b05
font_01_sfnt_off0001f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F890 10556 bytes
SHA-256: 6fac2fbf635777ed06d19b3ebdad69e5374ca3b194326acc955ab8325812e477
font_02_sfnt_off00021060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21060 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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