Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a3ebc840f27744…

MALICIOUS

PDF

85.3 KB Created: 2021-03-20 06:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce00a0735183c7c34171cd4e316dc31 SHA-1: 2e888ad5cd4d4eb50c6057e910737a34efb2ce4d SHA-256: 80a3ebc840f27744935579a8601dc6ee85a18a5588cc0f2f24eeebe8e87b4ebc
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 leads to a suspicious domain. ML and ClamAV heuristics strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains keywords suggesting a lure for a PDF document, likely to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/award?keyword=entropia+teoria+general+de+sistemas+pdf
    • https://static.s123-cdn-static.com/uploads/4388619/normal_60058cfda7e99.pdf
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fc7b0f8d8c08.pdf
    • https://cdn.sqhk.co/burajugi/a0NHs6x/40280965239.pdf
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5fe72b58435a5.pdf
    • http://tokepubex.getenjoyment.net/92880934925.pdf
    • https://cdn.sqhk.co/dijadive/rGgihbf/26188806889.pdf
    • https://cdn-cms.f-static.net/uploads/4365580/normal_6038d59e89203.pdf
    • https://cdn-cms.f-static.net/uploads/4495251/normal_600f62cfebd44.pdf
    • http://lawexape.mygamesonline.org/audyt_it.pdf
    • https://cdn.sqhk.co/notizejamebo/eiaoIWP/dragon_golf_course_edmonton.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/54d2aae5-c07b-4349-a6d9-4857f0742d26/43961455107.pdf
    • https://uploads.strikinglycdn.com/files/b2a2706c-28d5-40df-8f9d-f711c37a0b7f/fuxef.pdf
    • http://jaxunukologefis.onlinewebshop.net/tri_fold_brochure_examples.pdf
    • https://s3.amazonaws.com/regovadeje/allied_school_uniform_detail.pdf
    • https://uploads.strikinglycdn.com/files/27adf352-0ad5-431c-996f-2bb6c4a175f6/dell_inspiron_3520_laptop_specs.pdf
    • https://s3.amazonaws.com/bededuxotulapil/79155714597.pdf
    • https://uploads.strikinglycdn.com/files/8e98ec17-d516-400e-b092-46c95698ad16/madame_butterfly_play.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010062.bin
f3ebe648f32af766a935722080f0fac474a0042c72a79228c0655cc8855417b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 5104 bytes
font_01_sfnt_off000111a2.bin
e8f0f9cec2dd1f647230c41e4f70acc4029aa17fc2673a7e65475bdae5212e00
pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 12744 bytes
font_02_sfnt_off00013833.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13833 4324 bytes