Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2782ff1c85485f…

MALICIOUS

PDF

92.6 KB Created: 2021-08-06 01:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0220264d4ecc5d2ce23b3de419bce748 SHA-1: 9c46a9bdbb8397230bb8d64927a7bc0c7ddd4dd2 SHA-256: ff2782ff1c85485f6f1cd8a050f7e390da3fabb6bb257f0dffb8a4aacd78fc56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to mimic movie download sites, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://incoyun.com/calisma2/files/uploads/tesokimajesa.pdf In PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/dksitvfjbjdvf31dc3k2r87hr6/relonowuzekibodupir.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6ed568739---xenejofuzumodalogujulasab.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/99287270425.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609604bdc4b1f---40053769298.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5dee8840600847b8dd859897f328de16/19989575256.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/52707172384.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088655cb8945---92802074757.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/96394522675.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7dd80a617---27956470677.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/93910267163.pdfIn PDF document text
    • http://ecole.ru/text/images/file/lisemenerivaxezade.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/gulutudolizukabifalu.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/fowimovure.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/kazaluwexoromig.pdfIn PDF document text
    • http://axwelindia.com/uploads/62327587771.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/77092000909.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5a4b676f313595df1c1b9dff290fd227/xupibipesumunojo.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/duvekumokiforekubixu.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/08eba6758a3f17fba1d635dc776cae17/lojabuwexim.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/furagokoserakoruzaxomob.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/9657411403.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab64464517---95319964057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=logan+full+movie+in+hindi+dubbed+download+720p+khatrimazaPDF 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_off0001028a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028A 11572 bytes
SHA-256: 67cf3dcd673bbac32f5821a0f63b8fced0a30d907d7da084235f76af836e2541
font_01_sfnt_off00011d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7B 17668 bytes
SHA-256: 71aec41b3adafdf0446343f27eca3bbf7ebac22a9b03b65b1eeb623426a587b6
font_02_sfnt_off00014b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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