Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0234f7c6f73b01…

MALICIOUS

PDF

94.6 KB Created: 2021-09-05 15:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cbc1fe1e0f6b37f44e1429528102c960 SHA-1: f95bb122806a1e85154ba838e1dea48eb361e4a4 SHA-256: 1d0234f7c6f73b0100c4d4c89cf29d24fb5d117f44afee1a5c5d2c127816e0d0
144 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a social engineering lure, specifically a browser extension or update installation scam, as indicated by the 'SE_BROWSER_INSTALL_LURE' heuristic. The presence of multiple links to potentially compromised WordPress upload directories and disposable hosting suggests an attempt to distribute malicious content or redirect users to malicious sites. While no scripts were extracted, the ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/5184dbo4cg2q368sjk6qvdni51/nomekogojipozunolus.pdf In PDF document text
    • http://sccsfz.org/upload/50501905569.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/tazumuxavekivilelumuxur.pdfIn PDF document text
    • http://elitacasa.it/images/file/43903851922.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/98ccb5424cba407b4f8a3664c78a6f7e/bomunelugenoro.pdfIn PDF document text
    • http://nhandieurangmuoi.com/ckfinder/userfiles/files/34965304920.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091cbfb4dddb---bodegosige.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908a598e8e5---49621965764.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/jisivewewafekepitenura.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/79348484522.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/refezepidodok.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f65a8ec852---27984822602.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/13164762367.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16090c15c27627---varakekelurakir.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/23331140895.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/59077178075.pdfIn PDF document text
    • http://rs-entp.com/upload/file/37286178631.pdfIn PDF document text
    • https://defaico.com/d/files/vuzatu.pdfIn PDF document text
    • https://irantruck.ir/data/file/3249746764.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b6c9cb7822d6670feba5d412552f644d/vudimagesatukuw.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/e5bc2d06213b883f96db58d64a9bbf8d/98197549060.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/64374722244.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/egtq3got6hapnoo417i92b2jlh/jasonuririwapajidenumuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=idm+extension+for+chrome+manuallyPDF 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_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 11008 bytes
SHA-256: be22efb629905867394c8e531672f7c1d914d36001ffdcffe9f960fcefb2e65f
font_01_sfnt_off000125a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A9 18128 bytes
SHA-256: fe4c7fd805dfacb8bafbe7e7357299f97a1670ee82596dc80467700ae263a3e9
font_02_sfnt_off000154ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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