Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b574c1736cf49c…

MALICIOUS

PDF

89.4 KB Created: 2021-03-23 02:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a49e83d11719d8803e0d5ab28bdf9c5a SHA-1: 11483c116bf3fc0a90c1a0e70225b4648709463a SHA-256: 12b574c1736cf49c9af67edfb092b216cc69d6e4cfa80c0f969492b45d8aeeaa
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to SQL queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=all+sql+queries+with+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/denirinodo/hdUibja/kaxogolutenulodobipez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_602a36b8303f6.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/jdjaNFW/52286126231.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/jheghb1/50488673331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453532/normal_604a5fec16270.pdfIn PDF document text
    • http://igcopyrightforhelps.com/virapibebn9ib7.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/jgifrhe/99898275984.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/hiibSAn/ariella_azoulay_civil_imagination.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_605040e396e51.pdfIn PDF document text
    • http://santand-es.com/warorijowi7fnm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6608db-a9c8-47ec-a08e-43e275e4bd66/47915657281.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/agnel_technical_institute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a67a01a-b505-48ba-acc8-bbf6bfc852ec/what_does_it_mean_when_my_application_is_in_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eedf6dc-b844-4443-9c86-9cc1759c1322/61541031969.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/authentication_problem_wifi_tablet_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18fa6a9-1e19-46e7-ab51-1b13ab97884a/new_york_state_driving_permit_age.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_off00011de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE7 5556 bytes
SHA-256: c74ee08c6917c811ee18a1aabe3af2ee37c70512dad1710de61cfb857e811be4
font_01_sfnt_off000130b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 11760 bytes
SHA-256: 1bde76fe53c6f63a4036bc0ff6b560a1114c3cecd2063a611c91060c7974a460

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