Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cfe47e14c62b00…

MALICIOUS

PDF

73.0 KB Created: 2021-02-28 16:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c3a667655127895efdda454864d3587d SHA-1: 0b3ba88634576fe5fc37d3ad795bb33d32161f4f SHA-256: a5cfe47e14c62b00402c2287b42c8a923f03e9d048a1c11178c331a4a2c97d2d
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to a suspicious domain, which is likely used to host a phishing page or download a second-stage payload. The document body, though heavily obfuscated, appears to be related to the URL's query parameters, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://jottigo.ru/strik?utm_term=tenergy+charger+flashing+red+light PDF link annotation
    • https://cdn.sqhk.co/nufopusifa/boihigt/the_devil_s_advisory_council.pdfIn PDF document text
    • https://wabatopopelak.weebly.com/uploads/1/3/0/7/130775953/7243155.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/oHVjgWx/susuxenufaze.pdfIn PDF document text
    • https://cdn.sqhk.co/tasiteregixo/ugghagg/wizitikevijejatap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/7_android_tablet_with_gps.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/niniri.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/android_studio_shortcut_import.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/android_data_recovery_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/90403815296.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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 5336 bytes
SHA-256: c83172f59aa20cec5c3650b92b7c2b2ef266ea5834c01249a9c44a016b958e95
font_01_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 11308 bytes
SHA-256: e1c284dfdb26a7a6c27bafe78bfc1f4a1f9974fb5b33ed8a4aa07ac5015e09e0

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