Malicious PDF — malware analysis report

Static analysis result for SHA-256 955ec054510b91f9…

MALICIOUS

PDF

122.5 KB Created: 2021-06-28 00:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dbce8818f8c4d3597833e88065e384aa SHA-1: 6d07d73f70b4a348cf5cd8d88dd89e92e6a5041a SHA-256: 955ec054510b91f9b670072e69d7c34257dab5a487fa16ce6b93fad9a7444507
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external links on compromised infrastructure is a significant indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984098985f0---51055702092.pdf In PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/pepmpggve976c7h2f1vq2ov5js/rureregefiduza.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fe87e0e2b---66633878473.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609626cf9759b---wafukikuje.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82079861540.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/67392833463.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/gifekodi.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb57c0f02---dixugozadamugen.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/zifunudisazalorit.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2sum45s4dd2qlvqild20hvk2ed/xivufakasad.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/duvasaso.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/5896705601.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/lgpg5qt6d6k7p0t4a8ng65n9v1/20968968451.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/13mpuuk6n7df5a34soktui5eht/13829247677.pdfIn PDF document text
    • http://ktcz.eu/files/files/51188719287.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaacc41195---26798237106.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/bebazabawinafodu.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c62a77b95f9f171dd1424655095b00ed/fibavo.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/zowapav.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/norutumefimisarofodazujam.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7cfbf06bbe6690a838942f6fe6d41efe/64058724371.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b9937ffa9---9286822880.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+twilight+saga+all+parts+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17955 18944 bytes
SHA-256: d4fa5b3dabfc3a41517781d1eea9ee8d10da7052bb8abb15dd3e19e1e00c4084
font_01_sfnt_off0001aad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2EB 10720 bytes
SHA-256: 86f946e9143f2d58b76a5a6dd495c378c71d24a21fc9f07b701040afc91ed6df

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