Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbcf3c348c777b7…

MALICIOUS

PDF

80.1 KB Created: 2021-06-27 22:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c4ed0b5d566d76c973b93113fb955152 SHA-1: e006e8366e4c94153234bf00c60f37e3b85e736b SHA-256: 7dbcf3c348c777b7ab8bef2c692a5ceedbc06cc3f25835042f4817e8c43b3d3d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users via these links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=business+plan+for+mobile+app+concept+pdf PDF link annotation
    • https://autosaloncenter.com/uploads/file/38751561609.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/b30822ac0316a518599616e027b3a968/buxorokefedasadijajawod.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/giwumulozirefabox.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210472006000.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcc483ba62---kidexajiga.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/10114587138.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/0hrram6qc7lg74h5dpq577bgem/waren.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/mimotiluxik.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/goxibusikosapumi.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/96902428354.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/7a13ec6b460d1d467afb9218aca3942a/nasok.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/c63ssjocmoh6l3k9ghat0elf1v/lezipane.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5340136a4---7502567682.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///96221179042.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/dae6683b638f423153c20c753c64fc8d/viradefuzawowejuwebufi.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c437e6bc026---midulediziwozo.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/37d6f755d4ae72ae173c02469f4a2f2e/fivis.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b207a206e04---fewujuwi.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/fibibitazodute.pdfIn PDF document text
    • http://allycatering.com/userfiles/xowid.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/kbgmmk2lfivq7a9in6223c8rop/65956257984.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5d4ae218ef6f3fcf7a6f53a0a6438af1/wuwizesazog.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a492c138a---xivosumopafilekowagov.pdfIn PDF document text
    • http://polletnv.be/uploads/files/23320853870.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/5165470075.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_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 16884 bytes
SHA-256: 310f1bba9c4e1a17c56b9111c4fe3ab2ed9646abf63b3cc0b9d0d2ca6e9042a4
font_01_sfnt_off00010126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10126 11072 bytes
SHA-256: b93a245e531efcd43e4fea4b2cb3f02bf21c0b904ace65ea06b856bd511c0cd2
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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