Malicious PDF — malware analysis report

Static analysis result for SHA-256 997b460490472a29…

MALICIOUS

PDF

66.0 KB Created: 2021-02-20 09:37:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 900e5891b43a28c1d9560cb67be06b40 SHA-1: f54309cd77b5db848cdd9366b71cece9318a7a3c SHA-256: 997b460490472a29d5fb4bb08552f75581864107cd88597d85d747d70e67104a
104 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains an embedded URL that leads to a page with a keyword search for 'craftsman staple gun 68514 owners manual', suggesting a lure to trick users into downloading a malicious file. The document body is heavily obfuscated, but the presence of the external URI and the overall detection indicate a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=craftsman+staple+gun+68514+owners+manual PDF link annotation
    • http://tranquils.space/gijodri5jj.pdfIn PDF document text
    • http://euroshopmn.space/zagezavutikiligbg4vw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_60145718e4ae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_602606881f161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5fdec0357ea09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368488/normal_5fe5ea597fcd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496360/normal_6029a0c437f2c.pdfIn PDF document text
    • http://vajogeboru.iblogger.org/10300988113.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/apology_letter_for_mistake_at_work_templatekq9sk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388815/normal_6008a065e899d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_600da78abcd10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujidurib.rf.gd/augmented_sixth_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/brigade_uniform_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/rodapezuberabeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/lagu_pekerjaan_beruniform.pdfIn PDF document text
    • http://duzivuzox.epizy.com/puturalalagezivulanur.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/cessna_206_turbo_performance_data.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/55840942540.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_off0000c3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FE 5828 bytes
SHA-256: 5226cf69ae3564596008d9ae81b2a63eb316bf42d02e80705fa787a58fb4c7c8
font_01_sfnt_off0000d7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DA 10272 bytes
SHA-256: 92aab817a48f4277bec4bee2aa9f20474357387a8a2ee557086be515ce8137d5

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