Malicious PDF — malware analysis report

Static analysis result for SHA-256 065bc3c7d7730dad…

MALICIOUS

PDF

70.0 KB Created: 2021-09-28 15:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 058c02372e107dd6bf08e6988b5d5834 SHA-1: e13a003e65735cdf2143826bff69cb31e1cdcd52 SHA-256: 065bc3c7d7730dadeb3cc0902febab504de1ccc53b7401ceb163d7977a2f0887
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://khmernative-rice.com/userfiles/file/60274962678.pdf In PDF document text
    • http://emblem4home.com/UserFiles/Member/File/31927415496.pdfIn PDF document text
    • http://trevorhannant.com/81525492323.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/fexibasosotufekusoroviwe.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/43963530147.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/rurofabazilevidedelolutep.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/77753299103.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/60095657063.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5748492481338c6ad981f0a2c36be056/madavajovijo.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/vodele.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/josujelewagisepik.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/solalorapumajefunasit.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/bopinesezepeb.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/55999306150.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/kijufoduletokokegokuzifo.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/zekefanixezotidebafep.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/pofafexexejobuxo.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614410c089500---mudubuvebin.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/70632523050.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/jojaz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354bca4835b---liripaxu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8622db5eaf1caf4ed6729b4deba4e241/13814514269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+free+minecraft+mobilePDF 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_off0000b21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21A 10696 bytes
SHA-256: f2ee5d46d02f9b29ec953ba4f8d092043e9543b9536cf3f74e6122f06da47e9f
font_01_sfnt_off0000caa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA3 15520 bytes
SHA-256: 5553b00c01460bf7495250af535d22ec1fad517f44d804329ce883bd0e5495e4
font_02_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1