Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec81201a79e97605…

MALICIOUS

PDF

79.6 KB Created: 2021-03-15 10:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58bcc7bf0b7bbc7ec69d78dc08cff8d9 SHA-1: 9eaaab1923cfe46221989aae3dfd69c334f350f3 SHA-256: ec81201a79e976058d4fbe9c21df204f27ece6a3be51f3debe4aea8a0d49a1f9
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 0.9993

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://jacksth.ru/wix?keyword=piaget+and+vygotsky%25E2%2580%2599s+theories PDF link annotation
    • http://hardcreditcheck.info/fupot7fyi5.pdfIn PDF document text
    • http://trelon.fun/what_are_positive_feelings6wxor.pdfIn PDF document text
    • http://front-glass.space/23941382165c1um4.pdfIn PDF document text
    • http://telgrm.site/pajetefikamt7bea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_6037feab8c031.pdfIn PDF document text
    • http://smcjd.com/nick_saban_the_process_bookfp98s.pdfIn PDF document text
    • http://idealicaitalia.website/216885025817f2gd.pdfIn PDF document text
    • http://strapslap.online/how_to_short_sell_stocks_on_etradehf86f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_602356115f4e8.pdfIn PDF document text
    • http://nukels.xyz/baofeng_uv5r_police_scannera0j91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_600ac9bc67f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_604f16d022695.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/woxorojero/67890784739.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/os_coliformes_termotolerantes_ou_fecais.pdfIn PDF document text
    • http://logasexa.epizy.com/let_me_go_instrumental.pdfIn PDF document text
    • https://2c5ec8d5-f9c1-4d2e-b5af-57fc4572578a.filesusr.com/ugd/7e0eb0_efef951ed11b46c5b279d8890f259b5e.pdf?index=trueIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_d4b0426d16b34d50bf612f4449a9405b.pdf?index=trueIn PDF document text
    • http://nasalimutele.rf.gd/arkansas_drivers_manual_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/93309781925.pdfIn PDF document text
    • http://gajikefobazute.rf.gd/vezaduwuribovabip.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/cursive_writing_sentences_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/amsterdam_tourist_guide_free.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/3448505062.pdfIn PDF document text
    • http://jewexaruwibel.rf.gd/380936744.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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 5336 bytes
SHA-256: 0b2e15c6acf7074a7cc920ee25d919a4b0954eefe3fbbf9816163260eda63474
font_01_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 10704 bytes
SHA-256: d4a51bbfe2288c94d72e07738832d2ee66b98ce12e776ec7d30dcc9eaadf0f0c

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