Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4a7dfa3fa3c895…

MALICIOUS

PDF

83.3 KB Created: 2020-12-17 05:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4ea79238d5bcb4d46251a43df2780f31 SHA-1: 1b5a94d638fbedadc52d1f97556ccf67ed74b74a SHA-256: 7b4a7dfa3fa3c895ece498c5f54f0b80972af85d396271ca1593c253ba32b76a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/123?utm_term=biot+savart+law PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfb14b1-34e2-4e5e-abd1-adeec4860078/bending_test_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/xesarogipodogodazalok.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/chamaram_malayalam_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/google_search_by_image_mobile_upload_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/38972709939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16588a7c-4b91-4059-9a09-5a617cbe57fc/mikubizilasalexaxuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c1d089-a3c7-4869-aa0d-0963b11c2282/71154966706.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3715e3dfdd95b60e53d86/t/5fcbb97d6fd93023bc0bf3a3/1607186815796/at_t_secure_family_pairing_code.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/aplicativo_netflix_android_4._1.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/sitol.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/molakisapuguvija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3722fe6-d639-4117-9ddd-bf7bf5a41bdc/tesibuzaroju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1c27ad-ee92-43a1-abb4-b95325eb3e99/86496367350.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/ny_islanders_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/manual_inversor_altivar_31_portugues.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65d205bcb0228a2a7d3ce/t/5fce76e04c5d49651cee3b6e/1607366369014/17992381389.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 4880 bytes
SHA-256: db53c2cdbad622ba2d6dee274a911848770dc438eb0a9fa8b498d5296fb2ba9b
font_01_sfnt_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 16576 bytes
SHA-256: e327e3e66ea5ad7a490f514a5e3db145dfc6a197fa7caa014ed7e6dd8c3de5f8
font_02_sfnt_off00012b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 16168 bytes
SHA-256: fb630fddbece919746e3764f8edd70c96f8863892dbcd169933668101ba4c957

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