Malicious PDF — malware analysis report

Static analysis result for SHA-256 84911660cbc0812a…

MALICIOUS

PDF

73.6 KB Created: 2021-02-23 02:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3b9dc987cac669911ef43919aad3ba15 SHA-1: 9573945dbd412933564cdf6bba36c43f2e6334a2 SHA-256: 84911660cbc0812a7a00b9920f1ca7ec7dae1a996e9a01c2a34599f3af45c849
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, appears to contain technical jargon related to database errors, serving as a lure.

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://maypoin.ru/aws?utm_term=db2+sql+error+sqlcode%253D-104+sqlstate%253D42601+create+table PDF link annotation
    • http://lightly.store/pokajewam1f9z6.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/gcqmXjc/bowl_over_meaning_in_malayalam.pdfIn PDF document text
    • http://wugafis.66ghz.com/lil_bow_wow_songs.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/wugidopegosegide.pdfIn PDF document text
    • https://vixubarurumufov.weebly.com/uploads/1/3/1/4/131454397/lidufo.pdfIn PDF document text
    • http://exampl1214.com/is_ipod_nano_3rd_generation_bluetoothvvwkp.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/ZGiegcE/geometry_dash_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/oTCEhb3/mefamij.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/mogipegi/wewefepip.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/ssh2_authorized_keys_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/pijunidiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/cross_connection_control_survey_report.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/61782089782.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/nts_lumhs_answer_key_2016.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_off0000dab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB6 5844 bytes
SHA-256: b3c94ddcd98aefd70c221599a1885e0a7c2e0e2bdeced2d34a8ed62818ddbd4a
font_01_sfnt_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 13148 bytes
SHA-256: 2b305aad17ffd559f5e4984175241e95ee59e597a6be762af726dec1a649bb64

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