Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bb3f2777e3d369…

MALICIOUS

PDF

77.3 KB Created: 2021-03-10 02:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 110ebfea52259b87b63dd61152b18f45 SHA-1: 639a2a5a9e7655878219b9174dc6e3cb5a4f0790 SHA-256: d0bb3f2777e3d3697e0ba0392b61e35fb66a0363c2eb2f5b945af72803f10b4c
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to a medical condition to entice users to click the malicious link. No scripts were extracted, but the presence of external URIs and the ML detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=cerebellopontine+angle+syndrome+pdf PDF link annotation
    • http://topshops.website/rekogitezukawejopale6wrcr.pdfIn PDF document text
    • http://kapusta.pro/rimsky_korsakov_scheherazade_instrumentation4bb6m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_60205580b4155.pdfIn PDF document text
    • http://otshelnik.net/myocardial_infarction_nice_guidelines_prevention6qyfg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365602/normal_5fff25244b2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_603c551631044.pdfIn PDF document text
    • http://rent-nout.site/3631817508617sjy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fd666267e97d.pdfIn PDF document text
    • http://detonic-de.website/tcgplayer_card_condition_guidem8pbi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_6004c2641e08e.pdfIn PDF document text
    • http://ligumexijigab.getenjoyment.net/55545268116.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/runuzitexokol/adaalat_episode_137_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/tout_les_mots_argot_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/24933501469.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/persona_4_golden_pc_max_social_link_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/tulawuxakexafife.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/rejisewifufesitizufik.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/5066893915.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/95797061881.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/lozuwumopala.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/angularjs_template_evaluation.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/41310730742.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_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 5508 bytes
SHA-256: 75bc7761e67e7221385c4924a00c12e8acd83fd5130d21d91d0776600c81d1dc
font_01_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 10552 bytes
SHA-256: 3da864a1a5920088cfb6baa5b1333da5c9f20dc75a9e8f9aa45a17808f7fcade

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