Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9ba8a320046fd2…

MALICIOUS

PDF

64.6 KB Created: 2021-02-20 08:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e94ff0f6b516e573a2f3e05815c623fc SHA-1: e02e636bbc781b6cc9d1dc6dded201ff955782fb SHA-256: ec9ba8a320046fd2d4e2ccdcae1f394f973a4b4ca8cc83db6b0e3722c76207b3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://crophysi.ru/wix?keyword=chemical+reaction+gizmo+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384299/normal_60190930911cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_600d6c30450ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_6029c538e2573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426942/normal_5fc5716f538d2.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/SAzjdsl/73844393090.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jeD0hf8/pukuxamewedilaxilip.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/iaquvUu/61969580971.pdfIn PDF document text
    • https://cdn.sqhk.co/rijatazuga/b0dhdye/loopy_looper_results.pdfIn PDF document text
    • https://cdn.sqhk.co/kotolodegag/gjjhpU0/gujurede.pdfIn PDF document text
    • https://cdn.sqhk.co/zokonerozo/dgc4uhe/adderall_effects_on_borderline_personality_disorder.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/gshd2nd/top_10_list_workout.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5ff3234033a33.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/diaxzJd/wulelitewakepewabo.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/IjbjOgi/notepad_app_iphone_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/ojejcio/68139168653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5ff67283bcbd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_602a2fc382303.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/k3mhahb/word_crush_answers_level_483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471092/normal_5fee10e87ffeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E9 5424 bytes
SHA-256: 8669700e888f24829d1ce1eee4b0cd9c7d2193c8d7274a6cc04484b956022e25
font_01_sfnt_off0000d447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD447 9620 bytes
SHA-256: 8008363097c335ad690d963f5b28f0f3360009a07d222e0ec51e756bcc957657

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