Malicious PDF — malware analysis report

Static analysis result for SHA-256 d522f035d2216bd5…

MALICIOUS

PDF

71.9 KB Created: 2021-03-04 17:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 913a45a41883e47a1d0df9fe39034dfe SHA-1: 46251624e2dec0fef8405a760ca0fa613566f00c SHA-256: d522f035d2216bd5b386465dc3b6f69c7b646eff2883bbf9048e195e4792d67c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to "Moog sub 37 presets", indicating a potential phishing or scam attempt.

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://dafemum.ru/award?keyword=moog+sub+37+presets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5fc79af26fcbb.pdfIn PDF document text
    • http://lazerepil.site/dragon_ball_absolute_warrior_iosmjge3.pdfIn PDF document text
    • http://sowadegepixu.22web.org/procreate_app_para_windows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_6040041c12b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_6038d8e140e81.pdfIn PDF document text
    • http://how2clever.com/magegelokazevalusigixidbn85i.pdfIn PDF document text
    • http://masozaxo.22web.org/40376702267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5ff7cc117f1e8.pdfIn PDF document text
    • http://kernig.pro/bubepuebu2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405440/normal_5fc9e0a7d5e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fd1f47c91345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5ff26f29d49e5.pdfIn PDF document text
    • http://mx50off.pro/6460346196687ohu.pdfIn PDF document text
    • http://itrom.fun/how_to_use_masterbuilt_portable_gas_smokert1pr5.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/defujo/que_clase_de_verduras_puede_comer_un_diabetico.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/d-link_dir-615_login_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/kingdom_hearts_3_prima_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/central_idea_statement_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/17632101431.pdfIn PDF document text
    • http://numakuzugurewi.rf.gd/replacement_key_for_barska_safe.pdfIn PDF document text
    • http://rozazidugo.epizy.com/waloresisunobetuxina.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_off0000de5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5A 5132 bytes
SHA-256: bcc19eb782fe6acf093187a99181e16ba2c3d0d16cc5f9544311fafacbce1453
font_01_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 10088 bytes
SHA-256: ed91f50362ffc0d4b0579e89a814b8bf3a2e177299af472345ea012729e75beb

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