Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d694092a89922b…

MALICIOUS

PDF

71.4 KB Created: 2021-01-08 14:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 932c2014cee93f0a270489a8d5ce4ca1 SHA-1: e8a68d638c9a363c7593df898de2181c6189738c SHA-256: f5d694092a89922b51131c7eaf95805b4248440e71e1debf6e807a28d8f5693f
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 pointing to a suspicious domain. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be related to sheet music, suggesting a lure to trick users into downloading a malicious file.

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://trafffe.ru/aws?utm_term=nuvole+bianche+ludovico+einaudi+sheet+music+pdf PDF link annotation
    • https://pawimugonuri.weebly.com/uploads/1/3/4/8/134882006/e9dd93.pdfIn PDF document text
    • https://zokanebawabor.weebly.com/uploads/1/3/1/4/131438448/3958238.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/55603c1fcd.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/baff87ac-54f9-4333-9b3a-2cda34aa44c1/zenogawewasupuwoji.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/lord_s_prayer_worksheet_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/zibibabeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad493fdc-1a36-4418-a843-423aae4ce743/sitokoneroja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00d5ac7-9b59-4533-be1d-366c2fdcf52f/jcb_cartoon_driving_video.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/kifagiwuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7638f376-f84e-46bc-b96a-62d9716331dc/weniki.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/koximejakalubekufekogema.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/please_find_attached_the_report_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9696ca90-5475-4355-8d2e-6d23c92e770d/turkish_airlines_flight_981_crash_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/free_blank_6_piece_jigsaw_puzzle_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/avatar_hd_movie_trailer.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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 5468 bytes
SHA-256: 51af96184d5be178a973040059a37cc7a761dcc0349b37ae0f2b8904dc4f4fd1
font_01_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 11584 bytes
SHA-256: 6c306459e8c56a3d82d7d78868ccdadc01be96654ce52216ed6d73a99ab2d216

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