Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd5ba609d56e57d…

MALICIOUS

PDF

87.1 KB Created: 2021-09-05 22:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1bd32ff7df19f3d2e2f680ea29a9d47b SHA-1: dc747d211a6107f2b36c838835ad6ff22d8c6233 SHA-256: 3dd5ba609d56e57dd8c03b540e7e1fbf0760f108171184a248b4eff6a1b252eb
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable domains, indicating a link farm designed to host malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing campaigns. The presence of multiple compromised CMS upload links and disposable hosting reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://rajatotogroup1.com/contents//files/89483614476.pdf In PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/r07d7o1bqdcvq8bs1kc9ih78mv/magazegajosipemekojuvo.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/15432153990.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/kemokivuwa.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/140ca7ffd875441e44dc809e7c25b67f/46385614710.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16090f43b6de3c---49276475552.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dce0b5d4d5---9850090275.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/kipotipeberasabixebilomes.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/10120395556131aca34bb13.pdfIn PDF document text
    • https://irrisyst.eu/files/file/38448381573.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210618135421.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/filalufenufavetosig.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/15198073760.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/favitosexovaxepinudid.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/73540440104.pdfIn PDF document text
    • https://sealskinz.ru/files/file/81979766948.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/fujatesade.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a19936be13a---jilokaweja.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/zumuwekitekivedidupi.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/34505146291.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/bixegezudokixu.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/sdsqk1itqoc92f59pd56a76ndk/78397173124.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/rufesofovaramogidakil.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/009baa0c47abde984ee9be2ce026e208/80791384766.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/allhj58ocg3gbgfb6dsg2al7qc/73736701053.pdfIn PDF document text
    • http://gibisch.org/files/files/gasejazojo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920b1c86c43---92842644404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=rabbitmq+installation+windows+manualPDF 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_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 10696 bytes
SHA-256: c0826513d1e60ad3141f75de9b524b6887a4a532fc16b3a658851986caf57110
font_01_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 18244 bytes
SHA-256: 1f52aa4f43aaf9c1dfbd73c5efa1b9312438eefa421f5372eb1006cdac587b50
font_02_sfnt_off00013641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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