Malicious PDF — malware analysis report

Static analysis result for SHA-256 827ef347f0f328c8…

MALICIOUS

PDF

73.9 KB Created: 2021-02-19 16:21:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5d95e6e2e2f1cc1adf582fe569d2e1f SHA-1: 9879d3c17eec931d7b85bee7537c0fad5b057920 SHA-256: 827ef347f0f328c81d93a6a44c6f606a845a4a99b68a13d5eff6e3839b1e2ee7
162 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 routes users through malicious redirector infrastructure and 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 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://yafferge.ru/wix?keyword=download+idm+tanpa+serial+number+selamanya In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424405/normal_5fd79658b5643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fdd2c5f3a9a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_601dd0d0495f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fc71af40fa56.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/hcievQm/fitejinuzozod.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/Rp5gfji/ski_safari_adventure_time_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_6014736500746.pdfIn PDF document text
    • http://kokilubowo.22web.org/filter_data_in_ssrs_report.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/fuwenoxuzasila/32123656031.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/big_ideas_math_geometry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/analisis_cerita_anak.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/network_security_basics_mcq_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/jane_austen_quotes_about_books.pdfIn PDF document text
    • http://tovujopojat.epizy.com/kenmore_progressive_vacuum_manual_model_116.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/android_framelayout_align_bottom.pdfIn PDF document text
    • http://virawumeritaxo.rf.gd/38233427813.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/tejiputujesefod.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_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 5440 bytes
SHA-256: f63abdb9696beeeecec3bcf186ed79941d8baaafcaf7eda62a1c4c20fb2d34e4
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 10364 bytes
SHA-256: 478a66641d74eb121491550558a8dbaf0c7a97054918bc28d308a2447100f035

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