Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d5bce5600eefa5…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 22:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9e3749806b30e2d2b8914cc2c2d4afe3 SHA-1: 425c7629674b026f98d93f401d3a3ca86c58a1f3 SHA-256: 83d5bce5600eefa55694610e2596f3cfca4e8a6ac470a9c5cd03409a7e80f3c3
184 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links to compromised websites and a raw IP address, suggesting an attempt to redirect the user to malicious content. The presence of a 'download button' heuristic further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://stehovani-ostrava.cz/static_pages_files/file/fokutikelidirenedini.pdf In PDF document text
    • http://orkoien.com/userfiles/files/30853164558.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/9837240d56b48b0565127f96678976d2/4304011468.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f90f4b3a4---tureni.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/19708861351.pdfPDF link annotation
    • http://s2ipower.com/survey/userfiles/files/zalipikudavex.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/uoja1ttlm2baa9jg9ubjd38473/gizabagom.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/bikatikap.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/51438869666.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/talovebakibevuraxobak.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/pumofun.pdfIn PDF document text
    • http://vhshf.de/File/fekivivobejodaben.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/xozosipusezokipofake.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/56375800656.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be1fe0c4128---54975687430.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b169e6466b7---83901382568.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/dixoderi.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/mjilfeorndg8nuk8dlssdvk00f/vovirefoto.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/xonumitugixekoxiguxuje.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/70388685426.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/lasefevaluku.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/wifikuvupozajodefog.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/fexizesunuzadunukure.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/20425417456.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/pubadibagorifimobize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=vista+higher+learning+french+workbook+answersPDF 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_off0000e272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 19240 bytes
SHA-256: d9768b854e7e7fc807c3d110fc714050022d24cd669bbf62e10a7c232a48a13d
font_01_sfnt_off000114b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC8 10900 bytes
SHA-256: 2aa0913b9fe75af27be4c42213a9bfcf7ff5045920a4b6305786b11c1b8bca5b

Open this report in the interactive analyzer, or submit your own file for analysis.