Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3bbaba569caf12…

MALICIOUS

PDF

76.4 KB Created: 2020-12-18 08:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 27850290a01e3e8afbeeebb78e3d3bcb SHA-1: 25a3b7df610b7eddb9b6f04f04b617d97f10d3d1 SHA-256: ef3bbaba569caf12fb393d0d71fa2ba9b0062b9e94b1c06147293d3bdfb05973
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV and a machine learning classifier as malicious. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to a 'balance druid challenge guide method'. The presence of an external URI and the high risk score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=balance+druid+challenge+guide+method PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489411/normal_5fc4d789327df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fb86cf000bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5f98b27e68e2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_5f9b593a5ff8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_5fbd99a72fe22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492294/normal_5fc4f2a789601.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://static1.squarespace.com/static/5fc781bf5c272238a81a8919/t/5fd7245d102ca46975fca277/1607935069776/40489418598.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65af18e72e5fdbcfd0ab/1606378928227/seiko_coutura_kinetic_perpetual_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfced18e72e5fdb9cf1a2/1606286573977/86934037575.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e349ee0f32b874a1f91/1606372916513/plural_form_of_word_prognosis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe05a3e6d49a06bb57f4be/1606288804142/fejasixiboz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fcbde6a1ef6d1662ffb6d5d/1607196268089/how_to_cut_iron_on_vinyl_cricut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1ea0da-d3f2-49c4-a307-145e5c20437b/su_kaynaklar_mhendisliC.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE003 5104 bytes
SHA-256: ab734f88d5860547e7aa88bdd0e59b03f440485d9f928ae027b96260af603faf
font_01_sfnt_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 10908 bytes
SHA-256: e12a561152898ddc52bd8481c0b27b2f58e3dd67ea76f3e1cc62d59c5d784eb5
font_02_sfnt_off0001160e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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