Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcffd2d64400c846…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 04:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 49dcb004d4c05405f5dcf217eeb06dbb SHA-1: b73c6cf9096273c45e2fc5b89b6d48d21ca68446 SHA-256: fcffd2d64400c846bcbed1cf4d128e70aa152754de27da75986b78908b2e8f63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://livredart.com/ckfinder/userfiles/files/fawarifakewazosumofok.pdf In PDF document text
    • https://granitabrasive.hu/editor_up/1561154276.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/90226705316.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/36468362915.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/joxudifoz.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/19856280367.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/bunobazojal.pdfIn PDF document text
    • http://saint-party.com/media/file/xuwisizifuvajemisexisanu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344e0e79dec---64265118951.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/f909e27a23c89f09d3d665153803bccc/pojan.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/keluvinasoporoleduwav.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/33972335485.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/pepelizamowalejodunizav.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/79838313807.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/ligakavirizifimuwitojufi.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/6861824647.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/katalopapunifakukigu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463f57f1ae6---pixibapalunekidap.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/tilededikalap.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/felofibewutezomowapixe.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/27912074844.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/mozijadodenopit.pdfIn PDF document text
    • http://suphammamnon.org/uploads/files/96418308470.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/wafumodaxosewa.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/50734767479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=marvel+ultimate+alliance+apk+downloadPDF 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_off0000d083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD083 10844 bytes
SHA-256: e16d1f46c679a662a9beaef1453a4e77ac24f78526473c4d4abedfd33e2c2f85
font_01_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A3 18396 bytes
SHA-256: 3bdc9498b5c8b1916edd92e594cdef97bb16e32123ce9c82620d9bb4425b8153

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