Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6d244662ac25e8…

MALICIOUS

PDF

93.8 KB Created: 2021-07-05 21:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1b855389995adb74e313b22d2a754769 SHA-1: 56be4ffbf80dd4bc2e45598e4a946992cd1f86ea SHA-256: eb6d244662ac25e88bb7c0007ac81eaacce09e9baf49d8e4c35dfe761269cc2e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://qqhanoman.com/contents//files/saxowubiju.pdf In PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/mosekufavusu.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9214e23211---5477086274.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/12370229424.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/1498015367.pdfIn PDF document text
    • http://safarang.com/basefile/files/83636097867.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c368a91bbb3---kivegival.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/vitulewuwoxexopinukaxij.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/0h6dlhqln8mmdno14f10t74d16/55924812832.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35835c468f---ragij.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/kemofezasotajexekemaru.pdfIn PDF document text
    • http://indecomavo.pl/inc/jujepenurumaro.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a55d5ab116---netadegaderaropigomuga.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/wonudemizakojajukefoxosu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf463eb71---bezijowe.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc9b02ac3---zanesusazam.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/99e27208cef905500a43a774eafb3d6e/peludomikibozadaxuxonamep.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/f5gen775ig4uu1hpcmdtec1qbj/teboxamij.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7d118e0e4---pavavonebobibudafunirapot.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/771663c2d45fd247ca4c28142fffb5f2/37639048009.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a330c5bfd2b---25339494980.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3de656ad23---84234088644.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/93517309749.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/de86ea6588a8ee9f7e844090e2a47297/7468726930.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2228199a5---volokipeju.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-conteIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+make+text+stroke+in+photoshopPDF 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_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 17408 bytes
SHA-256: 2925aa4a0248fe4239cc8b7c6c038f04a8e849487a116b4e17795058dc0143e8
font_01_sfnt_off0001395e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15175 10740 bytes
SHA-256: a2c16ffc58f9d86fc72a2f0d880f2b6ff2c21d47eebfd035b1db78c1b389a6d6

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