Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5efafc96fa7c2a3…

MALICIOUS

PDF

99.3 KB Created: 2021-02-24 18:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fac89765358f463bf6a95d470ebacee4 SHA-1: a578a45ac58a229c8592556674f65a29922b32dd SHA-256: e5efafc96fa7c2a322f7ecb1e04c57ef9deeb82bccf33f1f336373914966fe36
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, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'realism' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=what+are+the+key+features+of+realism PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fe3e40d461e7.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/dubai_weather_in_januaryf42yq.pdfIn PDF document text
    • http://terugate.mypressonline.com/84262572430.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/ropidadegaxut/a_ram_sam_sam_dance_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/tuwojiwepanalij.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/angle_of_depression_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/piano_sheet_music_print.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/87025431873.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/jutotaworubazipapunuzikor.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/48182937116.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/organ_donation_after_circulatory_death_nsw_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/44187812051.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/tagorawizasesigivilip.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/89185750337.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_off000146f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F7 5184 bytes
SHA-256: c9a0e7eb45e3b08db7000d3dc97298ec483b3ed353810657bcb054417dfa52d6
font_01_sfnt_off00015884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15884 12440 bytes
SHA-256: be43043da9004354c267c63fada92724646d15fdc06031eb31a52f8fa7f5f960

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