Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3a2c037d8feaa8…

MALICIOUS

PDF

86.8 KB Created: 2021-04-03 21:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b57a8ae6a4ac966c8787a0a58b6af79 SHA-1: e6c3bb39210031870bbec0c028b72596cdbb5ab4 SHA-256: 4f3a2c037d8feaa876ac1d161f5c1a32aa6380e99db1b0eaedfb6d083d37facd
104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=download+oracle+java+se+jdk+8+for+linux PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5fce47bed1e8e.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/pubidejumewapudadowave.pdfIn PDF document text
    • http://nitafibejuze.mygamesonline.org/33805380087.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/65593276319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408712/normal_5ffdef5872e4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367648/normal_5fe2dd57b9b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_602227b290dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_6042f7dc3dba8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ff13db3465e9.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/barrons_essential_words_for_gre_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1a413096-4115-453c-84a6-e19f3d0a1e7a.filesusr.com/ugd/4a2d03_8f6782bee5cd44a680e259c9c6665d58.pdf?index=trueIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_dc90448e5b924e6386870d4c732507ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/156f737b-4250-4529-bccd-92adbf51d468/dogajudilenajoporilog.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_bbfa7356ba744320855d0776f6a74e4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02c1390-43c3-41d9-a188-5cfeb1cff282/82161409552.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_cb2fde2aa0c94331945e32ecec574384.pdf?index=trueIn PDF document text
    • http://pofijiserige.onlinewebshop.net/nurojoberarixuxuvixuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15351872-4ad5-45aa-9829-967cbd6e4136/why_is_competition_law_important_for_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8c1454-f380-4616-b1da-f5c360fc4438/docker_commands_list_for_windows.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_b2f7fd83ab654e40a2e4dd0def95ba09.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10649 5368 bytes
SHA-256: 67e909a48c74db102b729713fd5fdfb9bd1a33a26004ec8efc25cf3add6768f9
font_01_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 11668 bytes
SHA-256: fb771565e678a36827e9b0849255b7252c91ca0fea0c12d67dc0f70487a2deb7
font_02_sfnt_off00013fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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