Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec862e2780f9f30…

MALICIOUS

PDF

77.3 KB Created: 2021-01-01 17:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5a1daffec7667173d1a6bfdf24bd330b SHA-1: 90a82fa57129d3a6efda14e61f01536f89140c14 SHA-256: 7ec862e2780f9f301cf2e88982e571a2b47484aa9a6be1cb9623ec01e09be03e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'Boca ciega high school' and 'wkhtmltopdf', suggesting a lure to a malicious website.

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://traffset.ru/123?utm_term=boca+ciega+high+school PDF link annotation
    • https://jiliwadikejupa.weebly.com/uploads/1/3/1/3/131379685/babiligeve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459926/normal_5fc5c8fd6304f.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/lukuwurerawu-vovaf.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/vogubivajavofu/engineering_project_closeout_report_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9595e4-9cbb-4b6b-a391-d4cede1611a2/origami_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/ariston_washer_dryer_combo_armf125_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/36450154987.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/safut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cd8583-90aa-499d-8394-af93215291b8/sedasininiterutumile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edaa0f69-68c2-4c8e-b340-a048cddb654b/viwiridexasu.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/nalajemijowep.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/basic_arabic_to_english_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78709b74-a5b1-4707-8a01-e105ace3773f/best_turkey_call_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/dogikudarapiritivila.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_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 5016 bytes
SHA-256: 82c3394cee184a0b73e75cc8218cad4a122cda0951df9cc9d825a4f367ff7750
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 12676 bytes
SHA-256: 62694a07c9cbec6e5d53571da786c672a0e05e75054c1f17d4db218871098316

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