Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce3c0f17af07320…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 19:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a6cecd898589af88680017e2a9f4590f SHA-1: 173b1b34c5b49a5d9f08dd08d8a9c629b7104d42 SHA-256: 3ce3c0f17af0732002721ece4bb52467393b8bc675ab20c7a6c4dcd061520317
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised websites and potentially hosting further malicious content. The presence of external URIs and a link farm on disposable hosting suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/dp040pm17162auu67f2rv6sb72/34716230412.pdf In PDF document text
    • http://shengnabei.com/uploadfile/file///2021081000593485.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/423002293820f28bc70d402e0e9f6634/99453372149.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/90219341901.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609695f90e1d6---65537203922.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/fidilajakikefinujalido.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/77140590194.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/26741832843.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/doxisezulewowogadunete.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/xobezugilagosi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dc2ab73ff---42087651325.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161103ff6c6d18---mitogifevidasi.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/vs422elclha2ih87n47aj3gfu7/siwezasuvedowekemeserigos.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7c4168165a3c1096788b90cadb2232a7/zofutekug.pdfIn PDF document text
    • http://stattus.com/assets/file/laveboruxa.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed92e96e2bfb98a6dcf5d232805aa130/favinujugam.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/95836403651.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/63ff1ba050e2ad92c3661b2948795b6e/49529194508.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/vuvekazakomajepawimewase.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161358147691f5---29467284832.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/81789837077.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ht6ne92k3mi4o9diu09sones11/zipiwoxelexizexujivilozif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=oscillations+notes+pdfPDF 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_off0000d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EA 10536 bytes
SHA-256: f2b0eec69f0f0da95313fbd32241449e118ffb2c66e3fc08c70c9739bb55c42a
font_01_sfnt_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 18536 bytes
SHA-256: 60334993ff36f4a073a54b483c2ea2966c865cfae0e8182d8f78f57388989aef
font_02_sfnt_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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