Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ecc1e589018975…

MALICIOUS

PDF

72.2 KB Created: 2021-09-20 07:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c2cfd7a95867413562f49660eb09866a SHA-1: 13933369de7ad27d6929a59ab1668dc830a8a132 SHA-256: d8ecc1e589018975ec1f873d002ba07ede1fa173051f9c59871494ac0dd07152
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious content. The presence of numerous unknown URLs suggests a broad distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://qataminational.com/uploaded_files/userfiles/files/10109548085.pdf In PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161350453ec912---77986486554.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/14737485654.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/12191343667.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/4377183037.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/435939308590c4b4a507289e2651eae9/pumipafatafixim.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/petisubosefikovuwezujes.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/60487411878.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/jiretadanumula.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144564b93f6c---15126420835.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/33994279608.pdfIn PDF document text
    • https://558com.vegner.com/userfiles/files/20210919_090444.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/rinezasosepigesukiwew.pdfIn PDF document text
    • https://laser123.com/geektic/files/28070686700.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/danadukenipiwapaka.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143d3cceb196---64886569592.pdfIn PDF document text
    • https://go2germany.ru/files/file/72653161410.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/34185368106.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d29c96901d---69997960538.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/61843115071.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/83723688044.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/fepokuzusizotixadulugafub.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/marape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=programming+android+apps+in+visual+studioPDF 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_off0000b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD166 10768 bytes
SHA-256: 7f3de51112c6a632204573485b606442ccc8319e94208afa89b1d5c7013c9272
font_02_sfnt_off0000e9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F3 16092 bytes
SHA-256: d3847346cfb390201bcb6c74c4d8df7d7b1f86a4a3e0eed08fbf347b92be66f5

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