Malicious PDF — malware analysis report

Static analysis result for SHA-256 094fa982b789cd37…

MALICIOUS

PDF

75.9 KB Created: 2021-09-07 03:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34292dfdbc6ed9d8d4149149de72a07e SHA-1: 212d3463cf9c80a6bb68c70b4966211d40195853 SHA-256: 094fa982b789cd37c4c00bc8affb171de630cf0b0b8b88d0d82c38948fe4878a
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to disposable hosting and compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the 'Pdf.Phishing.Trojan' detection further support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://accomplishtheimpossible.com/userfiles_ati/file/79790907526.pdf In PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2d60e9cf6408b37d982fe6d3ecd7a499/5321522427.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///pajitakojepadasefuvizajo.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/57260888942.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/41775660624.pdfIn PDF document text
    • http://strap.sk/uploads/files/lipewibojezavowo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a0285ac4---zisedowarabetib.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608860b565d86---xopobegawizumu.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160791b3ec21a6---91621531027.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608399e1c4cb0---voribafijibaxorumigaj.pdfIn PDF document text
    • http://federalwayhighschoolclassof1970.com/clients/8/8c/8ce2019516a67423f07d8eefa67dd611/File/92192780507.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/44821905867.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161217c9ce5b13---94736769305.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/13628089261.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/99145024061.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/suguwixoz.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/45831538782.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/jofawafujaxodimevugaw.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/gawizabu.pdfIn PDF document text
    • http://entrackintl.com/uploads/75160411952.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/fogumol.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/148deb799e2af183b4aa73c12a94f739/zisedefiguno.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/dedetojuvex.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797c2ac1874---sixibarixu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082b575d846b---14615024950.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/doxemutidavirol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ip+address+subnet+mask+default+gateway+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_off0000c70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70B 16104 bytes
SHA-256: e706074c321d794d21c43b8a33d1218be7cf3e5d8dcacdfc628cb8b08c0a6713
font_01_sfnt_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001080e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 11112 bytes
SHA-256: af56465eaaf55d271dcd3789897e1cbcf06cbf69781ed9699f120f37865d76b9