Malicious PDF — malware analysis report

Static analysis result for SHA-256 5158ec17fbbf66dc…

MALICIOUS

PDF

74.9 KB Created: 2021-04-22 00:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adc1b93df96d8fbf79d5abc2f5c4994b SHA-1: 6a7512ad612ad0df8948749758792ee367aa431b SHA-256: 5158ec17fbbf66dca108944e01ae5f46f7fc485ebf8e0cb8cf967c4f3115b3b9
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL suggests a phishing or social engineering lure, aiming to trick users into visiting a page related to vehicle modifications. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.ofalloncasting.com/sites/default/files/webform/nunemoxajusadokuxilebe.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/gegemapoxazokex.pdf
    • https://ambrose.edu/sites/default/files/webform/kepasibadugemefobovabo.pdf
    • http://www.friendlycc.com/sites/default/files/webform/29579557159.pdf
    • https://www.a1touchsolution.nl/sites/default/files/51131620028.pdf
    • https://www.mainephilanthropy.org/sites/default/files/30695142459.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=2001+suzuki+grand+vitara+4x4+lift+kit
    • https://community.princeton.edu/system/files/webform/fivedexexefo.pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/tivajojisepizoni.pdf
    • https://www.healthdata.org/sites/default/files/resumes/mevupuxapiledowitire.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_off0000d5ce.bin
d0f3a659cccce20b19ebb5c4e376a2a6307c5f8631379fcd2e1f190989bb8802		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 5288 bytes
font_01_sfnt_off0000e7e2.bin
1efbf15faea159524cd69855028ee70b19e71dc17f02f7b88e765ff31089a48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 11488 bytes
font_02_sfnt_off00010ec5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 4324 bytes

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