Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b433e8fd5fae27f…

MALICIOUS

PDF

95.5 KB Created: 2020-12-25 22:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 06135f73cdff4d23bec1f062bf0ad49a SHA-1: 061998b2242b9b6459397021068485e78d2691a4 SHA-256: 5b433e8fd5fae27f23c146095927b7bd74dbe16d4963a33ac6d0d64f4c2cf73a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 Malicious Link

The PDF document was flagged by multiple heuristics as a credential phishing lure impersonating Microsoft. It contains embedded URLs, including one pointing to a Weebly subdomain, which likely redirects to a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/1322bfd6f7bc3.pdf.
  • 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://trafffe.ru/aws?utm_term=contact+card+template+excel PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fc47e2688160.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/1322bfd6f7bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_5f990a14eee9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_5fd77d68e8db2.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/7430751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5fc5b61c91a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_5f9fbbd77bff3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/62e56dc6-0478-4d95-a19e-833df27a822a/white_rodgers_1f80-361_clear_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34e2ee6-bed8-438a-b353-d1a0b59ed6f3/le_jeu_de_lamour_et_du_hasard.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/85573384098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259e047e-cbae-4550-a4e0-3cd65a6a3620/administracion_de_ventas_hartley.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://scripts.sil.org/OFLIn 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_off000114af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AF 4872 bytes
SHA-256: a0b0a3defbf37f3788d4ac0cc66eda78cc113c367a89f93cffe3de44bd72de52
font_01_sfnt_off00012522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 11780 bytes
SHA-256: 7b139dbb1796c0a190b454ef052750741e97319ee3ac68d3051005a824689954
font_02_sfnt_off00014d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D4D 16232 bytes
SHA-256: 68eef4b610644b6a98f668349b58b424e8310755c20c018328a8321db0e17a89
font_03_sfnt_off000162b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162B1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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