Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fce5c90f0f9c8c9…

MALICIOUS

PDF

71.8 KB Created: 2021-01-11 23:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: af58d08fefdc7ade474c87a7674b2c9d SHA-1: cd21addb47ca3292b822c6d62d56927cfeb3c070 SHA-256: 2fce5c90f0f9c8c9eea8bc4da9a62e73b118fbee17bca690d6f7a574f8e8c9cd
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a phishing site. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Momentum and impulse practice answers', aiming to trick users into clicking the malicious link.

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://trafftec.ru/aws?utm_term=momentum+and+impulse+practice+answers PDF link annotation
    • https://cdn.sqhk.co/pujapipiwat/hdjfhdq/52604167767.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/5hgiIci/takoxumogivugebelil.pdfIn PDF document text
    • https://site-1174959.mozfiles.com/files/1174959/72935465839.pdfIn PDF document text
    • https://site-1183794.mozfiles.com/files/1183794/beast_quest_series_13.pdfIn PDF document text
    • https://site-1179506.mozfiles.com/files/1179506/youtube_vr_360.pdfIn PDF document text
    • https://site-1195301.mozfiles.com/files/1195301/learn_to_sing_online_lessons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/firudegix/autocad_3d_drawing_free.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/biconic_headphones_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/powerpoint_templates_google_slides_themes.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/able_weekly_calendar_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/58805176310.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/writing_book_titles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/towariwogodopowuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/hotstar_vip_new_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/95668076713.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/bikiporinavenoreramusul.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/budget_excel_template_south_africa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EF 5316 bytes
SHA-256: 1e14aff0306199950f788e5846fe11b63516ee0da3fae0e0f1b9be59e023fb9b
font_01_sfnt_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 10416 bytes
SHA-256: acd17193122bd202b9f199f625857f7fb9c20392c4f04430832e1b08b1d3280e
font_02_sfnt_off0001067a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067A 2856 bytes
SHA-256: f580a44742b025a62a2fbe8a8757ac1f67b1541b0137b0a8d751a166a50a89fa

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