Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d48808e8613c993…

MALICIOUS

PDF

68.0 KB Created: 2021-09-18 04:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5856f29e3ed7ffb77982bf1e3e09cf6c SHA-1: d429421a3b38b11fd94e23dcb4dceb1c81f085c2 SHA-256: 0d48808e8613c9938949b9eb68f09a6a3118dd07203a78821f9cfdef5168957f
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 link farms hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or redirecting users to malicious sites. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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://changrung.com/ckfinder/userfiles/files/89213346734.pdf In PDF document text
    • http://musclecar-taps.com/js/upload/files/sakifixuvosapef.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/jugikanuxad.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/60245247831.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f3ed3f826---pafatusunagibo.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/libusop.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/vojawujagox.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/dupumalumojilevevekijup.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/1295510537.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/47e414fdac0ea93251eaaf47184646de/31989319662.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/44263898404.pdfIn PDF document text
    • https://bliznacite.com/files/zexizasedowazinevur.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dae5eb965a---petufevadibazoviga.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/pedoron.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0424fbf8c4746f4a21408c1872b1811e/98579066602.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/49544848045.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/831371007.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/23174182336.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/ratifugilakufefam.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/27510761117.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/74340862632.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/15067162296.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/14167689819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=serp+competition+toolPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/mivimufaxumemakeboz.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_off0000af4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4F 14664 bytes
SHA-256: 41db7f1473f1fb8ad0e1b1d1c7c68a3b5e21f355bdff91e8da686130e65dfbe8
font_01_sfnt_off0000d404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 10280 bytes
SHA-256: dbfccdcb3993719dfd6bb7a608c8d1cd9e4c30cf615a2e3691b8c847e7aeb4fd

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