Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8d4834a2fd2563…

MALICIOUS

PDF

78.5 KB Created: 2021-07-05 11:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d44f303c8cce7cec1fd14541861b2f8f SHA-1: b7978a43edd86e85e0cc66895129ced04664ad9f SHA-256: ba8d4834a2fd256301abaad37887a8fee6f8ca0b6d62e7233b7c01e36659795b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://catamma.ru/uplcv?utm_term=how+many+cups+is+7+oz+of+water PDF link annotation
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ee13aae1d00bbe692cb3946195f2d119/87746479826.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/r1obhu91osnn0odtq4k7v4ho3e/fowopenujegusodutasejike.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/77ed533c115683186d5a63345209560d/82015042456.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c09cf1d63f---zunirinimuzuwe.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cac308ba4db94d105abf5075d8385b60/vazofap.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7ce8da3ae---dikirifedekiziwetix.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/3ac10fd5b2830eb0156ff2a356855a49/28183142524.pdfIn PDF document text
    • https://puppometalli.eu/file/bexosabelij.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/zetidiwabibabodo.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/2vl9ofh9jl6m9aocr83hgcbhrb/vijigitadizopujilozigi.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/fejuvigo.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/g4gr3kmvhcgm52u62s6jbel7m8/9345211617.pdfIn PDF document text
    • http://tele-video.ru/upload/files/37376830462.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/ee06dd09cd0a843535f2b8046d432cfd/newabebuzukapagekumuve.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/robugovenu.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/2377475210.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d315c62077c95acafabaf76ad6486a32/9137822128.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a44b1690bf283ad40c79f699365901d6/baxafivag.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050119031334.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d19952324f7---vamonitoxunodubajepijo.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/mejuduxakotezalijuvoxawi.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/33748161182.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/72632351859.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_off0000ce49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE49 17284 bytes
SHA-256: fa03530ef6177aadc5b2f85eea6c782e6061e87a8c3cffaba52ad14c38af272f
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 10996 bytes
SHA-256: bb8de67d066dede0197a246d45be7da54784f718e5836bbb47d1597fa4c329cf
font_02_sfnt_off000114c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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