Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c3eda1fa9f926c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 19:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cfdfa67e8bbb82568c8e1521536e36d8 SHA-1: 3de82634b14c5c46ce8620efa07e92b145cf48bf SHA-256: d8c3eda1fa9f926c15f7a67fbd8e8ec0e2ff21fa8877fa081c9877ba88f33546
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'download photo editing software for pc' in its query parameters indicates a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://messianic.live/wp-content/plugins/super-forms/uploads/php/files/16a06fd39d1540287ac06bfb67c15eec/4469682087.pdf In PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/faxozitemetubitibi.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/xoxavap.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/sabobotubavemolaken.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/gasopukulexibaxokijaxibij.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/nefozirivumopunireweropi.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/8209112119.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4eb83825078ea5faf1fa416d4d4b00e7/lutudozirapaw.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/dovixogizujaje.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/xesuvinuxelivopisus.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/83385973287.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/mebepuze.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/bapazu.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/nedojifozikapadeluweke.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139653311695---ratefiwukuwudim.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/devumew.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614635555d148---tinelutabuvakopen.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/4879876757.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/digemizuwoku.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/85050342142.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/monom.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/nixupezodebemepene.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/riladofazu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=download+photo+editing+software+for+pcPDF 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_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 16556 bytes
SHA-256: 7de02a6597f0eeb2baca56e1af10a2d797cad270b187aa736e87df71c893cae5
font_02_sfnt_off000128c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C8 10984 bytes
SHA-256: 1c7d3d07f16af27113d3f5f396c9db72f14b470ab60135fc5ff982c3062ef56b