Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf47409a1a41aa44…

MALICIOUS

PDF

89.8 KB Created: 2021-07-06 14:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bf75ea0a74e252b9142596980886a89e SHA-1: 54925cac2c40d73b2ad1ad81b792c601432ef42d SHA-256: bf47409a1a41aa44028e158d2c9da35207a446016d2efb8103184610bb4befb3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ehomeforeclosure.org/images/file/96282082355.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9092782a33---wanawowosigo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xalixamakumetefaja.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/14860588116.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/6492248241.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/98290c214aa1989ec8cd85bc49906542/worapanifuguxavegelaje.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/mepozivimexofaxa.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/jumuved.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b024f568---kemakedavaxifirewesuvoso.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083511e768c0---mosejelu.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/44371741437.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210603080849194.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/14200782837.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/rogajerajevima.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/970b1f3ce732027c178701f96ee89d84/25368829806.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160833736b2c69---4556960332.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/4817769033.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/29812993063.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/963727118273fcd5b1f61da0bc5aac9b/gagiro.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/zikodegakabomakumupej.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/edc4643815c6c84c03721411030b6ea6/72407524138.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/96f6f2ff62f651f2f5220eacb9f9f6cb/sodeme.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/b28cb318199a01d308dd549fa6a97227/86504258889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=interesting+facts+about+dandelionsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11515 10844 bytes
SHA-256: 84bd6c6c2a13753168d8b191539cef7e3ba790cc0f4dd5a9eb16ef8afda5dd53
font_02_sfnt_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 16880 bytes
SHA-256: d16d2a4f91bece572032db10c3579dcfba880dbfb8099e56c6b4fe6d279edc0c