Malicious PDF — malware analysis report

Static analysis result for SHA-256 521fb94e657dfabe…

MALICIOUS

PDF

93.1 KB Created: 2021-02-15 23:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 38b93102c0579a1b21191a2b829166b3 SHA-1: 0a6467003142f5c18f216c5a432e36785f6808de SHA-256: 521fb94e657dfabe2d1c4978d8604e7ef508d745315707dfa0108ae24c6f43a7
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded URIs pointing to external websites, likely for phishing or malware distribution. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the sample's intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=spiritual+significance+of+wine+press PDF link annotation
    • http://vezerfa.xyz/shakespearean_theatre_and_audiencewhwe1.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/jbTgdhb/47747432199.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/kijRgib/drift_max_world_mod_apk_download.pdfIn PDF document text
    • http://ampinternational.org/51243462768a8m6l.pdfIn PDF document text
    • http://magnetfix.store/bestiario_ilustradoq2zl2.pdfIn PDF document text
    • http://dronextactical.xyz/surema39q3l.pdfIn PDF document text
    • http://interbankdigital.com/imagenomic_portraiture_2_license_key_freehvc8n.pdfIn PDF document text
    • http://it50life.pro/download_drag_sim_2018_mod_apklb98z.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/gofilafixu/lutimewaxepumilitad.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/86508858027.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/togomufojeto.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/candy_crush_soda_hacked_version_free.pdfIn PDF document text
    • http://wubulunonowov.epizy.com/56807032597.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/final_fantasy_tactics_job_guide.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_off00013101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13101 5376 bytes
SHA-256: c00f9fd0e0b8dde008a577f1d6544ca245cccac996feadf9130508aa71b4bc8b
font_01_sfnt_off0001436d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436D 10440 bytes
SHA-256: 59869875b6fc1f6c8e22947c931e5620bc8fe85d2c55eeb6c38733731a898a28

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