Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1f91ee1d781a48…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 06:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c123464132229d878b4bf5de764b1d7a SHA-1: e02fbf0280bac6c3d2b7e12dc2594d76825f1b8d SHA-256: 9b1f91ee1d781a48f749490dc9b9c0f0d90cfeb030da1ae38e77ef68551853bb
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'demographic segmentation pdf'. The presence of an external URI points towards a phishing or credential harvesting attempt.

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://soxebez.ru/123?utm_term=demographic+segmentation+pdf
    • http://vemexulitoko.iblogger.org/advanced_excel_charts.pdf
    • http://foxilajat.sportsontheweb.net/columbus_electric_thermostat_rk120eaa.pdf
    • https://cdn-cms.f-static.net/uploads/4459328/normal_602a06d817b59.pdf
    • http://tufodudem.mypressonline.com/convert_website_to_android.pdf
    • https://static.s123-cdn-static.com/uploads/4444113/normal_60030688752fe.pdf
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5fd81bb9b2c25.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://piduvazudofem.epizy.com/pinozorebig.pdf
    • http://selumaruba.epizy.com/how_does_z_for_zachariah_end.pdf
    • https://uploads.strikinglycdn.com/files/9a718b50-3ea8-4b29-b30f-d784f53c07e1/zikerotuzagasagusub.pdf
    • https://uploads.strikinglycdn.com/files/bad21282-53bb-4642-a3d4-49d35edec179/ruzelaxe.pdf
    • https://uploads.strikinglycdn.com/files/7a77929f-b81c-44bb-b903-5be074277343/how_to_indent_a_citation_in_google_docs.pdf
    • https://uploads.strikinglycdn.com/files/e651a43e-204d-47ee-b055-c7562ed7cb97/ritoxizewafujowozomab.pdf
    • http://mapakipoborepuj.epizy.com/88382246225.pdf
    • https://uploads.strikinglycdn.com/files/89a108e8-452f-4790-95cb-e3817fc0baa6/maytag_quiet_series_100_not_draining.pdf
    • https://uploads.strikinglycdn.com/files/ef2ca22a-ece4-4e3a-8e61-a4d55af0d85b/do_punctuation_go_inside_quotes_uk.pdf
    • http://fiwujugisijema.epizy.com/physics_displacement_worksheet_with_answers.pdf
    • http://bogalibamadom.myartsonline.com/asco_catalogo.pdf
    • http://lasikip.rf.gd/crystal_version_walkthrough_guide.pdf
    • http://simarifanudus.epizy.com/favubulos.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_off0000eee8.bin
8a81d77df1faf71461a6d3a0e4950d47b03ad6c70ad8e1f636cc263f353382f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 5536 bytes
font_01_sfnt_off00010199.bin
2b09c7aaffd3f2d9e0e8c9bae3f3d0ed299700065b58e53291ab6296fd766da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 10532 bytes

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