Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc6dbb1a976cc1e…

MALICIOUS

PDF

104.6 KB Created: 2021-07-29 20:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 59de4ef4b367011dd71c1411378336a6 SHA-1: 0815bf2eaad2ceef5e71146c4f2d43a82866cd99 SHA-256: fdc6dbb1a976cc1eef15b389c38c8df8fdc381eb596a3ce0a47bfa128bdd503c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting. No scripts were extracted, so the primary attack vector appears to be social engineering via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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 http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/funam.pdf In PDF document text
    • http://zentrumok.com/userfile/files/tobakifelas.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/xelefolidumozed.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eda7c107f---53011447008.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e33de2694---35922853584.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/87qvlu1deu1unptnphdr05uj25/25521775123.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c16675a3471---morosufuv.pdfIn PDF document text
    • http://wernitznigg.at/files/16762167770.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e40d42ec12231b7ac01e3157a1a6759b/febelipamutomemuwomil.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/b5ras87j6m6epd1h010bmn7o49/9345339495.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/82978803633.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a515a8816---divazikuwitoguwoke.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210617_2D2D7BA8E7C346AC.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e096494b65---nimerefoxolamu.pdfIn PDF document text
    • https://palet-school.com/files/files/tirumonujevofilusa.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c6e8c157e---furawerufubipu.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/nifitoligidavakufofefemos.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/rapomepirovuwalofamali.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7183orfkgdmbn3c75p7jao8cid/muwiwen.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f05732fb---4026443261.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c522f466a70cac1efb2233cecbcd9111/zerogekawupamaxafoxuwarod.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9a3521fc0---dikovusod.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3824d8ac49---43307205554.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cc85431fb2bd20f0a69004fa66e6f874/82553728785.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/ruvasivosidulujol.pdfIn PDF document text
    • https://artbynela.com/uploads/file/69701529993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=city+siege+5+hacked+unblockedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11341 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B58 11160 bytes
SHA-256: 70d0b10d539506d0d74f1f94b5fd7ff94628e8100096c96273663d22dc868b9d
font_02_sfnt_off00014546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14546 21264 bytes
SHA-256: f25a1dfa804db207b6749ac47af9975bbe7923bd34614b304ea01a4b9ec52427
font_03_sfnt_off00017d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D24 16312 bytes
SHA-256: 7ea4943b944f79889c397de1e47a57991d3bfe3c9146ed1c86df5ef3667767e9

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