Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6488bc1963b47a…

MALICIOUS

PDF

68.0 KB Created: 2021-03-30 12:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f1cd3eb6c9787d63827938574a679df2 SHA-1: 75e3dc9e9e0fea93b1d02bbc50f1428de27f63f5 SHA-256: 8c6488bc1963b47abc9279eae193e920c6b9d0931291a5fdebbfb4d3b331f555
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URI and the overall classification strongly suggest a phishing 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://seumenha.ru/strik?utm_term=life+recovery+bible+large+print PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369796/normal_600099bcd0afb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_600859366cda1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_601b315fa685b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_602b022db9240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5feefc08e3e07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5ff1db22ded9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_604ae63d5a690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabe00ab-77f2-4dd2-a8a5-7dbfca4499ef/the_game_tv_show_cast_brittany.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ee2164-478d-4dd3-9495-dcfcdd5706ea/what_is_the_word_analects_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac8e310-550e-45fc-b2eb-985dda621421/moveruwitilejegonodebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d395759-b5a0-4084-99cc-9469b011c3a2/sennheiser_rs120_wireless_over-ear_full_size_headphones_black_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2d76d0-c096-4f1f-a23d-6b4a8ad87cd6/dish_network_phone_number_for_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/elfen_lied_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f076bbec-9e3e-40d5-96f6-447db4fc0176/fomaradikepizese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd11e5e5-87b7-41cf-92c8-b34797b2e498/cisco_ip_phone_7941_voicemail_pin.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/tenses_practice_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/frescobaldi_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9dfeb2-52cd-47ae-bb9e-67b772d82c07/13759446875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa04cd3-32db-421b-a19f-313dee0340ae/93194869826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d770f0e-9c4f-4408-aa07-b09b175df9f1/96191292136.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_off0000cce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE5 5248 bytes
SHA-256: 3a78b76d916474cd1cd90162d2ba9d9bc864c4cc8a27d0ab6bc17d8d94c99455
font_01_sfnt_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 10596 bytes
SHA-256: 38f5b9dec29bf27f1c92d0fb8d68245e59dd95d2f54a773aa7b60f1e4e5c81e3

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