Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e5f75990777bfe…

MALICIOUS

PDF

90.2 KB Created: 2021-03-29 01:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8d4a52c5ba0f597d9f0188f486ec30e8 SHA-1: 401a80605f77ee2bbc6d21410aff40b6d47fbc2a SHA-256: b6e5f75990777bfe3bed5e39ff36cd256ae5eb555d40276f5a6feca6c2b35a89
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a domain associated with the lure, suggesting the document is designed to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest an attempt to exploit vulnerabilities or deliver a payload.

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://jumiwimov.ru/award?keyword=android+developer+interview+questions+pdf PDF link annotation
    • https://cdn.sqhk.co/devepogisog/jdCBhhd/16750731639.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/haBijpD/groupme_support_free_iphone_11_giveaway.pdfIn PDF document text
    • https://cdn.sqhk.co/tujujelo/HRngchf/kipedabejovof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_6034987161d5c.pdfIn PDF document text
    • http://coolvdomaion.online/64296876856qjjvw.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/dwYv7hc/62984312541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_601b31d709748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_60514222914db.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/caiajai/dragon_raja_director.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/hjMhhU4/this_is_the_police_ps4_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_601bb97695e52.pdfIn PDF document text
    • http://trelon.fun/kitiwizhek9.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/jixeremipet/2198177973.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/mystic_messenger_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/python_method_docstring_format.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/send_email_form_html5.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/85972490814.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/board_meeting_minutes_template.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_off000125f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F3 5092 bytes
SHA-256: f4ebd836f0a66ae12ba799d3dd9865026dcc94d1691000fa26d7bf72c17813ca
font_01_sfnt_off0001376c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376C 10644 bytes
SHA-256: 1761c77eaf27cd358b91c1f8a6f55495c5e472c99a557b64c64dad2d77bb1295

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