Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0456f04c574599f…

MALICIOUS

PDF

66.2 KB Created: 2021-01-16 05:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e94852aabef388a7658816032d8b219a SHA-1: c6f5270a17d7f190b53504e13f5647edb831a63c SHA-256: e0456f04c574599fdc3de60dc5fbb159b582978cdb9e796eeec77a730334568d
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The embedded URL and document body content strongly suggest a phishing attempt to trick users into downloading an application. The presence of PDF-specific heuristics indicates potential exploitation of PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/123?utm_term=phoneme+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5f97430558035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407069/normal_5fa901f7cd8f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446512/normal_5fce608489389.pdfIn PDF document text
    • https://site-1173944.mozfiles.com/files/1173944/juego_cover_orange_players_pack_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8ca4599bea1.pdfIn PDF document text
    • https://wekisakalew.weebly.com/uploads/1/3/4/6/134617168/depujit_vivijabilabeju_wutolulanamo_senif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fdd31451a9be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/ha_channel_is_the_belmont_televised.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/we_are_one_lyrics_whitechapel.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/gubomuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/fabric_dust_sheets_homebase.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/72985714373.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/alarmsense_panel_manual.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_off0000c3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E0 5260 bytes
SHA-256: 5bb8f1da6997a0d4485c5afd40ea7139ae42d483a48ea3ddb16173129ae21619
font_01_sfnt_off0000d5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AC 11096 bytes
SHA-256: 81a9805926d914d15316f5446888adc9588c2242323c9c0bb9ad50d09a4c96ce

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