Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4cbd8915cdb4d7…

MALICIOUS

PDF

69.5 KB Created: 2021-02-16 02:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 255f77fd0a4d0be6ff94579cbb25be23 SHA-1: 6505f9367978b9888765c1d9aa5b09d8de6eadce SHA-256: 9d4cbd8915cdb4d70548b7ffc5f1e3caadc977b65bd597c4ae419b314b13d58c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded external URI pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=d%20&%20d%20coffee%20shop%20brooklyn%20ny%2011219 PDF link annotation
    • http://bigtittybella.com/70914790311abycl.pdfIn PDF document text
    • http://petajofap.22web.org/sixonuwadati.pdfIn PDF document text
    • http://hurleyshamburgers.com/free_net_movies_downloadfax8p.pdfIn PDF document text
    • http://fruct.space/online_buzzer_button_for_gamesb883x.pdfIn PDF document text
    • http://invitesistem.ru/free_financial_spreadsheet_excelhxdg9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_60281836aade5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5fe6265c54976.pdfIn PDF document text
    • http://samozanyat.info/dovaruxikufariruridemusith899.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491148/normal_6004bec860fb6.pdfIn PDF document text
    • http://xazonem.22web.org/axminster_hobby_bandsaw_manual.pdfIn PDF document text
    • http://instapriz365.site/video_site_listsvoe1.pdfIn PDF document text
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/7075454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_601df5d7b2f6a.pdfIn PDF document text
    • https://mosutija.weebly.com/uploads/1/3/4/5/134502389/72f8784.pdfIn PDF document text
    • https://rilulukopidu.weebly.com/uploads/1/3/5/3/135323077/sotut.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/fejififimaketo/whatsapp_status_animated_video_song_free.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/ditoxevobadulakajubulad.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_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 4156 bytes
SHA-256: 9253c4ec90eb8b217ae91b3aef6412788d3d1419415539c5cfb70110cf842fd1
font_01_sfnt_off0000e57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57A 10544 bytes
SHA-256: b928ee6d7d50bc5b66854fb190cda9caf0a7a662752d54b9b75cf1f177ea33eb

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