Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a881935599163d…

MALICIOUS

PDF

98.2 KB Created: 2021-03-27 11:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7851434938ef994765c8824af103632a SHA-1: 8008bc9342f3ff32536d4a261cc9ae6a6e070910 SHA-256: c6a881935599163d81aa7babb94ab427852938a30408f276becb4eed6535735d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that point to external resources, suggesting a phishing or credential harvesting attempt. The PDF structure and embedded content, though partially obfuscated, are consistent with malware delivery mechanisms.

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
  • 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://seumenha.ru/award?keyword=penyakit+yang+disebabkan+bakteri+bacillus+subtilis+pdf
    • http://nekuwagibajese.getenjoyment.net/55230594152.pdf
    • https://cdn.sqhk.co/tubadaluzafu/jgtjdwC/free_cartoon_channel_on_dish_tv.pdf
    • https://cdn.sqhk.co/nibijegun/hhdabjq/79813027683.pdf
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5fe051bde4dd2.pdf
    • https://cdn-cms.f-static.net/uploads/4381094/normal_600a6f6ca908a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_f51fd0d4cff24282b5d65850cf5f9ff9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5578215c-55f9-485f-9e2d-ea5fb01fc52c/jugaxuxijonigubevot.pdf
    • https://s3.amazonaws.com/xutomoxu/batwara_movie_full_hd.pdf
    • https://s3.amazonaws.com/senodiw/tetakuwub.pdf
    • http://wotidupodugi.myartsonline.com/ahad_nama_free_download.pdf
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_33e58fde989947e9840d46f4d6a8a493.pdf?index=true
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_4e92ec7f782b43d7b978e2e883804cc7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/04b76150-419a-4386-9e8c-b9ba4fb59dc4/garmin_vivofit_jr._2_aktivitetsur_star_wars_dark_side.pdf
    • https://s3.amazonaws.com/pizivurapab/rodirijoponil.pdf
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_9fe20086a4a14806863df5385d5ea64f.pdf?index=true
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_65c2bc8eb9064ef6a08dd8eedad3e6e6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/639284bf-766a-411d-b5a3-0042c49cbc89/excel_formula_autocomplete_not_working_mac.pdf
    • https://s3.amazonaws.com/mutirexa/aerobic_and_anaerobic_bacteria.pdf
    • https://s3.amazonaws.com/sugosubexez/sentence_structure_definition_literary.pdf
    • https://uploads.strikinglycdn.com/files/d02335c0-7a66-48f2-a257-f5f2bb055fef/gazilegapitomafisomaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142db.bin
4655708416a8bfe47f4411071102d0d0934927cc8309d6c9ad2df5b32f0a8947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142DB 5632 bytes
font_01_sfnt_off0001561e.bin
2364fc3431f0f0dacc8062bec1590edfd871cc8ab886374cf0939a496c34271a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1561E 10960 bytes

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