Malicious PDF — malware analysis report

Static analysis result for SHA-256 30082b5aa582a2a7…

MALICIOUS

PDF

353.2 KB Created: 2021-07-20 03:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6de9834707ba5011ff222e50e607ff40 SHA-1: 8478fdf27e2082bb12f8d25787929673b66191c2 SHA-256: 30082b5aa582a2a70cd708d82acd1de221eb87137fe7228fe2f52fd96fcbe1ab
166 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, with heuristics indicating it is an advance-fee scam lure. It contains numerous links to external PDFs hosted on compromised websites, suggesting it is designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of multiple links to PDF files on compromised CMS uploads strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607222919f477---26118214435.pdf
    • http://brmhn.com/userfiles/file/20210620055151_2hgi45.pdf
    • https://creteotels.gr/FCKeditor/userimages/file/6932577363.pdf
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/160003547841.pdf
    • https://allcreaturesinc.com/files/files/63232654106.pdf
    • http://grimastone.ru/files/funaxanujepolizen.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddf7795cd6---perefetoma.pdf
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/76998011560.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/pfble1g9lm0hggghqg7mkag7h0/81081123005.pdf
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/galasuvizare.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/848e73d2e8b32b6c66f92ea1012c4f72/devaburiputaw.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dea520e14a1---losot.pdf
    • http://tivatijapan.com/uploads/userfiles/file/dinowedawivoraz.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/96812092255.pdf
    • http://gilendor.cz/userfiles/file/13470500393.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c333935bb0---butaxafadoviw.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160870dbdcbfb8---77523266582.pdf
    • http://xedaptap.net/userfiles/file/nowesevapinadomomi.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a32f9f22ba2---21208003844.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/sujadafetagawapux.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce9a6e5841---23282429858.pdf
    • http://noithatnhapkhaugiasi.com/luutru/files/jutojokijomexolivag.pdf
    • http://www.almansori-ye.com/almansorifiles/files/vizuledosomidetin.pdf
    • http://cl-metalparts.com/d/files/3535765654.pdf
    • http://writtenmail.com/upload_images/file/50905691898.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ba2743fe0---seromopa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=psychology+fourth+edition+ciccarelli+white+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051002.bin
80a5d8d43db176252480f45c477006295e4687bd89151d7777cd55f0b409dee1
pdf-font-stream PDF embedded font (sfnt) at offset 0x51002 11200 bytes
font_01_sfnt_off00052a1c.bin
c2dd8bab02071739b5a86ec0239fa4ad4cc10d6a5e5aa62c2ff7d7795b78a9e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x52A1C 19768 bytes
font_02_sfnt_off00055d55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x55D55 16792 bytes