Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba11267945a95370…

MALICIOUS

PDF

79.1 KB Created: 2021-09-04 04:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f06fa8860e4926c1259eaa4abe6dee6f SHA-1: 88f558811ada388abe5c54355dc0b2bb048babfd SHA-256: ba11267945a9537077fce2da3ec49bfce7eaac45c730e05e8c6e0de2a6686658
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document attempts to trick the user into installing a browser extension or update. Several URLs point to compromised CMS upload directories, indicating a potential distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/gt7h73ic00bqfhgvs6nfck6fkm/zemumagalokatawunagi.pdf In PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ebm920qdk0i7f0m3kro4mgmclu/joruwu.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/2429458486.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/24745412956.pdfIn PDF document text
    • http://iphysiology.ru/upload/4434612367.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/buwuximuxukuxuguwujitoweg.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/loxomasamim.pdfIn PDF document text
    • http://fteq.ru/files/file/butazabewexanu.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/38542143595.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf456ea47a---dobakanusa.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/lisetifubufeso.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/gitunixojemitifakiraramag.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b348db309a6---87616421296.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/40e0ff26715051aa5773bcbaafcdb8f5/gebesasixovijamagujubovix.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608609679163f---64354820761.pdfIn PDF document text
    • http://aprt1day.ru/file/52410618835.pdfIn PDF document text
    • https://uangraja.com/contents//files/pimiwejaxexud.pdfIn PDF document text
    • http://uchid.com/uploads/file/pejirisadapetivevivemovof.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/4f09f19b36e1b30c61ae2cea3296d385/69438738955.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160e3330f5c40e---65917220754.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f55c90ef338b9648a054ce5415beac91/tizuputuxomonasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kitab+kuning+bahasa+indonesia+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_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 10956 bytes
SHA-256: ba8bd3558126a99ab435067dc3eda52f008adf763dfc80b18ff59f143c2e7a0b
font_02_sfnt_off000103a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 16660 bytes
SHA-256: 90560087141046317a2d3d96d6caba0a835224f727124c3efbe9997ff32b097f

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