Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2336ff91a9d1b05…

MALICIOUS

PDF

80.1 KB Created: 2021-07-13 23:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: abb0ce03b7a025cbca49a80596afee36 SHA-1: edbf092889783da984a43e71403f43eece128bd8 SHA-256: a2336ff91a9d1b053fbe0dd8a3e77e5c63bae2d53c515be140f2b79edd9dde0f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised websites, likely to host further malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are designed for SEO manipulation and hosted on disposable infrastructure, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4372d0e0f549467ffbf972f206057ab1/57136145751.pdf In PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/8c6a7cdca1fa2ab1bd8c0b97628ee03f/livubivipaj.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b2648b8c0---rizomisobexipu.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/debobademonifedoro.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7d11a5895784ebf6fa105b20677bc9aa/43597643088.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607023672205b---90494185972.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/a34f9cfe752211cc17a9b22e920524ff/vowojuvosuzoluneluvi.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609656784e3cb---75918661478.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/69273023420.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/58909941107.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/webuzubezizuzeguxuxub.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/94g8r94qejivchgf62qqqcni75/56025631400.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33f535061---getomopefide.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/aa0cd955c25463a876aa1427f4fc78ad/bekipenuwutinuluwu.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/kefufopuzafevepajulojam.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cc11272448f924640de81152cd984390/sebajilaratodefel.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2edf04c94---46995154708.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/dinuribukenox.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/gonox.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210608091857_0ffi19.pdfIn PDF document text
    • https://motiv8workout.com/up/files/60368505258.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/tezufitaxizebadosik.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fa4q26habotr1p2edlas77esia/guwopigedev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+draw+an+alienPDF 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_off0000d922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 10148 bytes
SHA-256: 6348059bb98f26444e3802b211b6e2e12c900ff72d5491a96bf9fedd997b61e5
font_02_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 16780 bytes
SHA-256: 5c31b3fd8ec60736e116aaae98ba573dca25dda19c158291664c9a6c88b4b183

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