Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfe7e7135af49be…

MALICIOUS

PDF

85.3 KB Created: 2021-07-05 16:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 19fbf035376359e6d65e93c4df8add64 SHA-1: f0ace6142b78bf37f18b45f8a443a328607a639f SHA-256: bcfe7e7135af49be6f2efdf90bdf143fdc94b812e6704ea9dc72e0aeca389205
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute phishing or malware payloads. Although no scripts were explicitly extracted, the nature of the URLs and the 'ML_NYX_PDF_MALICIOUS' flag indicate a high likelihood of malicious intent, possibly involving embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://philabc.ru/uplcv?utm_term=relevant+and+material+evidence PDF link annotation
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b9614e87ecc---nogejubin.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/rugofukosew.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/81982509822.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/791353fbbc5553a0af4e336ba1ea72a2/89354492291.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/gomusadotujozepe.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/89c1bf4e483fbe8600762f56eb52dbf3/55848224717.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c69f3a91f74---misegisili.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a35615639ee---97598977118.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/4828025879.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160824d9a8ac67---laruxejapelov.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/waxufotagobevike.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/pagobasosonojuleruroza.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce4f53a999---83819547197.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/lokumufukesaxutufaf.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d90d8e34---sivekorake.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff138e091f---gumategilujuli.pdfIn PDF document text
    • https://ocw.tw/uploads/files/xuvalozuxiladadufaseral.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba9d417c4add335d8bb5accf870def30/kuxulopufurus.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6846d4e77c---nizipoto.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/kevaxiladazadobovodir.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609f67c8e6228---21091741527.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/xawin.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/zozomaxapo.pdfIn PDF document text
    • https://makenie.com/upload/files/xafokidadekowi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b22a10108a1---jebiremumumozuwokeruxek.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/vokujebaroboni.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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 16544 bytes
SHA-256: 053097ec7b234154449c3d42e6e808df9d0e83bb16ceaacc04786e729e28aa1a
font_01_sfnt_off000116ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 10356 bytes
SHA-256: b3ece5d4990f69c0d17189f32c23627bc58ac0a115cbe196248879afa1d0bda5

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