Malicious PDF — malware analysis report

Static analysis result for SHA-256 e011ccfc60b09eb5…

MALICIOUS

PDF

74.8 KB Created: 2021-09-24 11:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 65e1f70be5371610141216e4e7877b19 SHA-1: f46a8debed7485c7ed603aed3f18fc2e713254f5 SHA-256: e011ccfc60b09eb54cf403bcf463a4db49c04b9de9f0b9f45160b7880c897ea8
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, with critical heuristics indicating it's a lure for recovery secrets or private keys. While no scripts were explicitly extracted, the presence of numerous embedded URLs, many hosted on compromised CMS uploads or disposable domains, suggests a phishing or credential harvesting attempt. The document's structure and embedded links align with a phishing attack aiming to trick users into divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://icon-studios.com/userfiles/file/gubawiginob.pdf In PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8689b28fc9b17d8bca4b5f1b03ff29dc/24791628508.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b86e23993d---99240980903.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/6551956643.pdfIn PDF document text
    • http://amandamaitland.com/images/file/43433681755.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/kexudusebudizapowotukosej.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/44448941792.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1632333597.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/bujun.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/2704001027.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/d81acfec27aec9c7af4fb27c5562291e/37782840008.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/salozapu.pdfIn PDF document text
    • https://valuekare.com/ckfinder/userfiles/files/welabupevenada.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/46011077548.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/daluzutirilikazi.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/peketixuvosuxiviwadine.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/8482657829.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/mirefuvolovev.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5c4b6226d---45724678694.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/wosifirazozatavijonanoj.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/gugufafisi.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/60764551643.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/45009374749.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/41135614103.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ghmm1pumr9op1iscpm9r39n2ph/48597830949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=network+setting+androidPDF 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_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E9 10532 bytes
SHA-256: 8dac3734f7bac9bd94581a026a7f85a2b0f8b3b292372e3371d67c7a85137dc0
font_02_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 16756 bytes
SHA-256: 29c09b3cfe2111eeec878eed87e16d079a4d7329d6299bc9e984c221f72253ad