Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b567f1deb07d41…

MALICIOUS

PDF

87.8 KB Created: 2021-07-27 20:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 15ed33e33fa245b95fea3b1020afeff1 SHA-1: 571fed4140daca33f7e3c80fe90746649afa0312 SHA-256: e2b567f1deb07d417d4b23af3c4ced5bba72681936f12ec948e5564b833e1674
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous links to external PDF files hosted on various websites, many of which appear to be compromised WordPress installations. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a phishing or social engineering attempt to trick users into downloading further malicious content or divulging sensitive information. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • 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://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/bksdqubqsg6g8n29cvp1183to7/97224133311.pdf In PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d37ec65baa---37125542630.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2bb8ddbc2---59058988109.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/dijibewazu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/bmotcmiko1fjc8lu2mvml3l7rd/36999283799.pdfIn PDF document text
    • https://ahha.az/userfiles/file/jifav.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/amgena4790kt658v0hpogc9lt1/romawapuniwebefavomesuzat.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/bowufudusumanak.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/tovujopaxebila.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e779c1f11a---11366276344.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/gonexakowurapid.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c5f5b39b---11210996003.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/73853807568.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/b9kln9jebgnigept33h6sarkjr/24635136097.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/futona.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/37692072697.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607214be3fd13---30074389008.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ce60fe05b3c1b9081e266ec680fdf9af/kegidoveminozi.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/vewatowalogokan.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/80551240341.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/43112577777.pdfIn PDF document text
    • https://area5srl.it/file/mikalunotegesuzapujejedem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+win+big+on+scratch+tickets+in+massPDF 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_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 10940 bytes
SHA-256: 30ae502788a36762aaf09ca1e865fc747e126286b14b857c4573f4567ee8daf3
font_01_sfnt_off00010993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A5 17656 bytes
SHA-256: 16dedf00c3f375e9ff1ac6c11508393fe3fe12470ddd23cc523def0353060420

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