Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b368a73f19e9da…

MALICIOUS

PDF

70.2 KB Created: 2020-12-23 19:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 428561e4d31a45d12287a4d377ccf5f3 SHA-1: d8dce67588c0a8771faa08f8623cccd11f0cc1d2 SHA-256: 33b368a73f19e9da7c159cf3cb5c7bfd741885e9fa99acfc0998f64d120c3b11
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to phishing or malware sites. The embedded URL and the ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting related to the 'Netspend app'. No scripts were extracted, but the presence of a malicious link is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gettraff.ru/strik?utm_term=netspend+app+not+working In PDF document text
    • https://cdn.sqhk.co/fojufifef/gjicw2j/56154911810.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/WgjThcD/all_album_audio_song_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fc36707dd6a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f8a517751d78.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/LG9twgd/como_revisar_mi_saldo_at_t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f922e96e80e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f91d5eb2f0ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fdfc7a20c966.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/2MgiDib/cops_shot_knife_wielding_man.pdfIn PDF document text
    • https://cdn.sqhk.co/gusorewiwal/hfAmShj/52266307547.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/jhiiibC/ragaja.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/zesotat/netamafif.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/bazaar_movie_hd_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/chess_apk_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/47153388057.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/mathematica_5._2_free_windows.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_off0000d4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B1 5220 bytes
SHA-256: c423653ca7f7e93ff3b374da22e8cfe4601148fa83b0feea3370e478c5949cce
font_01_sfnt_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 11024 bytes
SHA-256: 1b36b639b7a6b8efd70b874030b919e182561191c2f08e834f58d850e568c31b

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