Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f89fbb3f6c21a41…

MALICIOUS

PDF

85.2 KB Created: 2021-09-09 18:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd07f2560069369200fb43e8fba95e0f SHA-1: 59dea9845b8167e8cc1081e208cc3ac07533afc5 SHA-256: 9f89fbb3f6c21a41a1e8b3b0b9684d45f5615dd3667b098219399ff99ae6f420
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as malicious and by an ML classifier. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to copy and paste content into a command-line interface, a common technique for executing downloaded payloads. The presence of numerous URLs, some pointing to compromised CMS uploads, suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://argumentua.com/i/file/76590870185.pdf In PDF document text
    • https://flyags.com/editorResources/file///11232147589.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/jomilodugimerodaxexazuje.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613965885d5eb---64441441692.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210909_14C8CE0D02E1B62E.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/didipifidefulowuvileligaj.pdfIn PDF document text
    • http://professionalcatererspaul.pageindia.com/resume/cms_files/files/wireporepodoxotap.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/9126249569.pdfIn PDF document text
    • https://12shio3.com/contents/files/2324434230.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613147b1dcce3---69831375749.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090918183873499.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/tinimi.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/18899644058.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/fijazetovupidosi.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/fodezososogen.pdfIn PDF document text
    • https://advik.net/userfiles/file/46331783952.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/27035975065.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1e422869f---2326493632.pdfIn PDF document text
    • http://ahknchem.com/upload/files/57021965941.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/685vem680ed5bdnb85p108q725/nolabetinivuxuwomidexi.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/paropazewinajumaj.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/zofawe.pdfIn PDF document text
    • http://leruichem.com/upload/files/soripowoxinudagigijoveja.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/fonumivividu.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/jepikosofopojalafigomaw.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/vivavewamika.pdfIn PDF document text
    • http://tid.vn/upload/files/85795061232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=watch+meet+dave+online+123moviesPDF 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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 10936 bytes
SHA-256: bafb1b42e6da352b8ad6eb9ac5b14f4fe4da0c4f078bb4d33e397cf365f72648
font_01_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 18572 bytes
SHA-256: 7f966aef99823363e9b02399435a53571ef76581614e3ac47615ee0dfa3568c5
font_02_sfnt_off00012f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1