Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a9e69ff528f0b4…

MALICIOUS

PDF

79.9 KB Created: 2021-09-02 23:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 433f9f646ae7ad2e1f654b86bf23c231 SHA-1: d4d7dbfad5269f8983e82c67dac462818843ef9a SHA-256: f4a9e69ff528f0b424a59ef39168a470105c8fd929eb43a5fc3ed00409d27862
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links, many pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lnianemarzenie.pl/userfiles/file/xesogiwisevitobogebesogox.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c59809912a---falimom.pdfIn PDF document text
    • http://ropesadventure.com/d/files/vakudipafefuzegezitagil.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/ponetukixenetopobegazopa.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3653a439bb4596c9513f710c49e9658b/44734975590.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/goxezonufulaxinoxuz.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/12147142530.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/f9d4d8496e4249ea89de8fcf5a7ef329/dodowevalutefixe.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/795259ba4ac1816c6a422462c4f14023/3904861774.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082b82920dcd---rovikina.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/kulakenizetaluferigewi.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b73f0c9431f---lepevagovejubevitul.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/pizulewobokufukemiv.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/48264719386.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/nidopodesuwemolilepejezuf.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/nutivolav.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/tavule.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/99667712322.pdfIn PDF document text
    • http://candientushinko.com/images/file/68621446794.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/bewirelenufapebaf.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/99a7c677b35bf94bb87931c9e07b9ad3/zibozokar.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/mikobiwozi.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///filulalilinofu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d3e339203---dekubobumusodobapim.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/nedigago.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/78777158361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=printable+mexican+loteria+cards+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3C 11024 bytes
SHA-256: 8e392fb3854ec5c006963304ef47e072fd500245d0d1adf347425c55abbd04ae
font_01_sfnt_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 18748 bytes
SHA-256: 52ec9d2c2bc53990548ac60c446e1da6bede51e0266c4846a7047fb923fe20ef
font_02_sfnt_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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