Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9db7c11e197286…

MALICIOUS

PDF

100.7 KB Created: 2021-02-14 21:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 66d4725abec841d82ab3fc1953ea523f SHA-1: 33df21ea2b5404d1761c0b70633a5a8a2ab76745 SHA-256: 8c9db7c11e197286ec86b7769811255524e68a5f108a62047eeeeda84dd51c94
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=managing+oneself+pdf PDF link annotation
    • https://cdn.sqhk.co/sigidezok/OBjcsgf/88232412942.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/0jiUiff/36202965468.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/jeRjaja/90817412105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_601708860c761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5fe417927ca13.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/VhhjfI4/android_messages_auto_save_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/aZIlIib/exonerate_in_a_sentence_history.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/wenobagupexekap/jupakubepewug.pdfIn PDF document text
    • http://tovujopojat.epizy.com/bluetooth_headphone_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/retivemibaxabodumonulas.pdfIn PDF document text
    • http://wowinagapujepok.epizy.com/7969903970.pdfIn PDF document text
    • http://tikobonojaxax.epizy.com/69692490195.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_off00014cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDC 5116 bytes
SHA-256: ba021338ed76fa67c5f6ed959f7c913f12e56725778b1bce064f343483d9a9bd
font_01_sfnt_off00015e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6C 11280 bytes
SHA-256: 00afe3f354c7ff5c12ff37fea5c6834da03cfc490ff4175d1b4953249b84c924