Malicious PDF — malware analysis report

Static analysis result for SHA-256 556680366ce44488…

MALICIOUS

PDF

85.1 KB Created: 2021-09-17 20:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7911c70d0e455646b10cae13e4aa045c SHA-1: 15dfd46f9aeba492551cad1df4be998c2a5761c2 SHA-256: 556680366ce44488cc8c734152a69585ada161ed9662c363bee6fbe0d757bb73
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_MFA_LURE' heuristic indicates it is designed to harvest credentials or session tokens by mimicking MFA prompts. The document also contains numerous links, many pointing to compromised or disposable hosting, suggesting a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://cbconsulting112.ca/userfiles/files/90461398901.pdf In PDF document text
    • http://logenamerica.com/userfiles/file/sotadokadoparuvipame.pdfIn PDF document text
    • http://wych123.com/upload/files/25384279314.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pozununugumafagagop.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/1072799053.pdfIn PDF document text
    • http://doanandieuduong295doson.vn/namthuan/images/news/files/24265614787.pdfIn PDF document text
    • http://gavionescodeinsa.com/userfiles/59633151003.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/23591208453.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/sokopajibegixojuzode.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/fukudolefoxotojenapolopes.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143847c278bd---86178242753.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/xonosanuvov.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/82578216101.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/66579108163.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/ropajekumoxu.pdfIn PDF document text
    • http://apcmagon.com/userfiles/demarotapolutenabaxe.pdfIn PDF document text
    • https://parkettworld.com/upload/files/jafuw.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/gulobime.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/44312712716.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16130850a7c718---1178127304.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446653b5ffc---gujuludojekine.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/80277433490.pdfIn PDF document text
    • https://actor-conseil.com/files/file/ladusuperedofaxadajev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=harry+potter+film+series+streamingPDF 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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 17524 bytes
SHA-256: 9e345185950ac27a5e8f92dd9f92d81e025037551206cd4bde42360e38f059e8
font_01_sfnt_off000115fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FC 10804 bytes
SHA-256: 6b7f49fdaf0a248d8d4cc30c40b3c1c81d826c67cce2030cb165fcfc1bc066e6
font_02_sfnt_off00012edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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