Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6b9aa745d1fe1f…

MALICIOUS

PDF

86.1 KB Created: 2021-09-01 12:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f478d4e24d55a97b78db7bc275a45125 SHA-1: c9a751a837e3330dbcf3b5c2865d5301ebc20da4 SHA-256: 8a6b9aa745d1fe1fbdb1cf456acaef83cce9425e51507a15a3bfe6ea22b4f584
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The structure suggests a link farm designed to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://chcial.ru/uplcv?utm_term=tearing+meaning+in+english PDF link annotation
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/9094804755.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6d134030---35745909403.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5beba594a20efbfd75b185e1cf0e8b8d/82903679086.pdfIn PDF document text
    • http://szybkieprawko.pl/szybkieprawko.pl/user/admin/fck/file/forevob.pdfIn PDF document text
    • http://risme.vn/files/ranavuwudominebixekeb.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/woveradaxobuvokiwupa.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608629c54395a---24399248760.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/fewimugikani.pdfIn PDF document text
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/gijokovuzobobapavir.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c3ec22a13a19bb2f4b14b72f93683820/majazovo.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/zegefije.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/volanarakodoluvejudowom.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29775221642.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/moxutajenawegofuloromu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4dbed73e5---66171251848.pdfIn PDF document text
    • http://reunionclass.com/clients/7469/File/giralanokefibowuwomuva.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/zabobi.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/xejimawa.pdfIn PDF document text
    • http://ashioke.com/images/library/File/joburozi.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/loduvubosafumow.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/sogadosasiw.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/bonoxenibojag.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3bc188048---libidurozexuwujaxi.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/dunofexosifagawinuxuwuvat.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161172235c0e33---zezef.pdfIn PDF document text
    • 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_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 10300 bytes
SHA-256: 9b1b61dc44c2672fe2bda52a211f5f8207be158ab78d8b7a91cba5928cf77d23
font_02_sfnt_off00011764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11764 19492 bytes
SHA-256: eaaa1ca35378fbdf5ebd53c37a379d715ee8ea4be1633930f1a4e7b71334eddf

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