Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1efdc45aef5d44…

MALICIOUS

PDF

68.5 KB Created: 2020-11-18 13:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a27635b2f74010613fa1235ca6fea32f SHA-1: 59abf47f58bfc3344967650de2a5ab33518af2d1 SHA-256: ba1efdc45aef5d44218310efd6be9c06d935aae3bd1279759daae8315981b580
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that impersonates a government agency to trick users into visiting a malicious website. ClamAV and ML classifiers strongly indicate maliciousness. The presence of an external URI and the overall detection score suggest a phishing attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=social+security+disability+office+eugene+oregon
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexavofezoxi/advanced_systemcare_android_app.pdf
    • https://uploads.strikinglycdn.com/files/dd539fcf-a2b1-4d1e-b8db-c44ab3d2eef6/nupapiwilopidu.pdf
    • https://s3.amazonaws.com/pukasojalu/what_is_the_psat_test_for_high_school.pdf
    • https://s3.amazonaws.com/dazemi/23259405039.pdf
    • https://s3.amazonaws.com/fujadabez/16830198722.pdf
    • https://uploads.strikinglycdn.com/files/fd3ff74c-29b4-410d-bf9c-b49ab47812c4/dallas_county_mugshots_2017.pdf
    • https://s3.amazonaws.com/xukonakefules/savoxelazumewewimakosiz.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/barry_white_song.pdf
    • https://s3.amazonaws.com/wewuxuviwar/99241602604.pdf
    • https://uploads.strikinglycdn.com/files/f1211b50-ba89-4bb8-b0bd-b8b43da5c623/con_mis_manos_levantadas.pdf
    • https://s3.amazonaws.com/wupiwupiwot/91130558610.pdf
    • https://uploads.strikinglycdn.com/files/ecd2d622-8acd-42c3-9604-f5f0cdc48726/fizowiwifasumiwujibuve.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce20.bin
2c197c9a7bb0dd6c29f4b7baf2131d3194eca139c8e2a6e37a8875ae10e32c7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE20 5536 bytes
font_01_sfnt_off0000e105.bin
91593b384d140f215a42b72ced4117e0109e580b9184031205a3b9018547aedd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 10564 bytes

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