Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20aff70b59013f5…

MALICIOUS

PDF

77.6 KB Created: 2021-02-20 17:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 428c0ecd85d27dde6a4c2f7f53583165 SHA-1: 2ff96527ffeb52c4f6b897a698c7a4082b0ac242 SHA-256: e20aff70b59013f5fb5a3ec703f0f44d9197250c7fd144b79b2c600abc5d5147
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged by ClamAV as a phishing trojan and a machine learning classifier. It contains an external URI pointing to 'https://baarspo.ru/123?utm_term=how+to+book+pmp+exam+slot', which is likely part of a phishing or malware distribution scheme. The presence of a visual download button lure further supports the malicious intent.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=how+to+book+pmp+exam+slot PDF link annotation
    • https://cdn.sqhk.co/vimerokil/qGgqifp/gupapapazeluleluni.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/5YhjigF/download_gunship_shooting_strike_battle_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_5fd989b48a11a.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/2FihDVM/nupafosiwaresiboj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_60279c264f44d.pdfIn PDF document text
    • https://cdn.sqhk.co/bapinero/hj2gemx/xegekikufutojejawuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_602c8937cd0c9.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/XidXk0m/71081070688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_601844a2f0f2c.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/ggfQvfp/73335890549.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/dozuga/354077561.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/slope_intercept_form_math_antics.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/koviwizirujovog.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/musisebasabuwebasozekewos.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/bubbleupnp_licence_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/wokilefarajuxofetawiso.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/android_republic_epic_7.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/golden_guide_to_hallucinogenic_plants_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/financial_accounting_and_reporting_cpa.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_off0000f199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 5192 bytes
SHA-256: e5400cf5e5bacbfc1828f91efa023cdb2e7c92bb424daa0aa70d5444584db5da
font_01_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 11516 bytes
SHA-256: 68a197a61556f26fdf8d68742eb900ddf01c4d23a12159e05ba5810dc1b3cfcc

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