Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0d5818972fd7c9…

MALICIOUS

PDF

86.2 KB Created: 2021-09-01 04:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9b1a5e21364054a818531f35761397e5 SHA-1: 3f9b58e2de84cfd2c071389fb4b0e8caf683bd5a SHA-256: 2f0d5818972fd7c9fc94aa1f4a91817f37ad04ec19b1be1685bfc38292a0bbd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised websites. The embedded URLs suggest an attempt to distribute malware or conduct phishing operations. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16082c66ff3228---6567673236.pdf In PDF document text
    • http://myshopekerala.com/userfiles/file/39097696479.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/rejenisijukumes.pdfIn PDF document text
    • http://damoorefamilyreunion.com/clients/7/71/71c8bb141a0941b69292984b9770a174/File/34965237055.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/7s53e9urp862tbh9mlj5d9egbb/406472031.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077b0ead67b5---xipasigiwudoxagibexatigob.pdfIn PDF document text
    • http://slpclassof67.com/clients/45391/File/vetesekikupavediwadojava.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/01b4309e2f126e6096ccd54ab1f7a491/85339676881.pdfIn PDF document text
    • http://jngf.cn/files/file/jojawidepeketidatufed.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160886bdd39ea8---simebunirakowugufu.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161289f6f809ef---92173965772.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/49860506307.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/66542120184.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e45e57ff6---sowoto.pdfIn PDF document text
    • http://webbuilders.com/files/file/milazinamoguxatejixew.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/zidiwosepeserewiv.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bcd70b659---63972467397.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/kuzedimimu.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/93563712681.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/45643643182.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/56610155284.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098c88ddf983---46186973653.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16090cb813663d---pogavenaxasigisususifa.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/49113759874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cod+zombies+outbreak+tipsPDF 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_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 17944 bytes
SHA-256: e2265a13759c57e3cb5f3aca3ed5a36fe4c1274cf2607fc38de6ae653bb8b931
font_01_sfnt_off00011a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A67 10824 bytes
SHA-256: 2ed06f18b7a3434c7433d186a90d3aa21d401f700e7d89d635e764fafc22b5b4
font_02_sfnt_off00013343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13343 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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