Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb510915cc909443…

MALICIOUS

PDF

79.7 KB Created: 2021-01-06 21:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f97fbdaa52e90b10da84aa5f8a57e391 SHA-1: b982c3c220eea4c429023bb24918fbe217c88ae2 SHA-256: eb510915cc9094439902b18a839d5b806d13d1b16a40c1a23cb62ab483e0fcce
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 by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'Baby trend playpen take down' and an external URI pointing to 'trafftec.ru', suggesting a phishing or scam attempt. The presence of embedded JavaScript, though not explicitly detailed, is a common vector for malicious PDFs.

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://trafftec.ru/123?utm_term=baby+trend+playpen+take+down PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452853/normal_5fa12010673e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_5feb914348b39.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/hhhj3ic/bajikeregekilokane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482216/normal_5fba18f17d9ce.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/Riggdjj/trick_shot_basketball_nba.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/7b5663e3-887a-4377-adc6-e0830e3636b7/samsung_tv_wont_tune.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/training_bras_for_men_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/rebexox.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/wibagatofexovavozufaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/small_split_and_merge.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/bulbul_bird_information_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/nibitejixilanipogesowap.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/27751930138.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/application_for_employment_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd16908c-6a38-4ede-9882-4b1940cc50fc/office_2016_torrent_espaol.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_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 5220 bytes
SHA-256: db239e5f6ab49e44e7b23beb6ea1b6c1244623e160a2c8cb9a864df6332cba85
font_01_sfnt_off00010c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C20 11048 bytes
SHA-256: b24aca36ea4405aae82d946b3c5d33b8e9a4abcb2704e16aebc88b3fecd651a9

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