Malicious PDF — malware analysis report

Static analysis result for SHA-256 90df92f6a0234954…

MALICIOUS

PDF

82.1 KB Created: 2021-05-31 20:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7b19f435d2a1f1bb0765fd3344f1b67e SHA-1: 5c79ffad5f68680dde627618e7f0e61a963f76a0 SHA-256: 90df92f6a0234954383977b962e51206e1336c9edbfca733f34b6c2b883c997a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to economic concepts to entice users to click the malicious link.

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://nomylo.ru/pbw?utm_term=concepto+de+economia+segun+autores+de+libros PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369190/normal_606ea096bd3bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475389/normal_60603babd2d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_603ae949c6029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_6027da3b832e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_602590a7acb35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425912/normal_5fdbbf562b696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5fd388226d353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fd18244b7ce3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5ff3a02d65944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144413313/pokemon_go_spoofer_apk_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c5c222-6900-47eb-b127-7bd304945c5f/how_often_does_newborn_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791073ba-b0df-40bc-b914-0a8929602464/libro_algebra_y_trigonometria_con_geometria_analitica_louis_leithold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d914877-51da-43d9-b0c5-1a42a81dd519/femozodapujejezejejos.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/pivixusimefepowos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d368cd89-5fe1-4f26-9f55-8c1248c60386/3.5e_prestige_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4b7108-4b6f-496d-a45a-3723be916d63/38129766206.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144420588/audi_a8_d3_owners_manual.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144420996/siwin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001019a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019A 5436 bytes
SHA-256: 30f522523d76b5c282df426a511b6180d70dd25df28ac536d049e29b753f3b0b
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 12052 bytes
SHA-256: a824249ee8e89503c80b6aaa6ec23069e0fdb819b3d2f2e32c1d4fdba879519e

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