Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ada69fddf8cb4e…

MALICIOUS

PDF

73.9 KB Created: 2021-02-28 11:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edea99ed147b8c4b91a9ebcf0e0ca8f5 SHA-1: e734cec98bfec31efb745681a5dbc41fe293f9b9 SHA-256: b7ada69fddf8cb4ed605c0c0a23fc79d85998f1ec1e23f76184b178c683eab78
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit vulnerabilities or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=a+thousand+splendid+suns+summary+chapter+28
    • https://cdn-cms.f-static.net/uploads/4388067/normal_601e059f17364.pdf
    • http://20970907.net/fejofixawepo42ga4.pdf
    • https://cdn-cms.f-static.net/uploads/4499317/normal_60209a7f42dc1.pdf
    • https://cdn.sqhk.co/jinubodilev/Oy0Dib8/truck_driver_city_crush_game_online_play.pdf
    • http://fasad-dom.site/55189893310oz6li.pdf
    • https://cdn.sqhk.co/zugeketinog/fibheun/tijawi.pdf
    • https://cdn.sqhk.co/sevafeluba/hjOTvgd/download_stickman_downhill_motocross_apk.pdf
    • https://cdn.sqhk.co/mikitikotak/fTAgiVG/dorod.pdf
    • https://cdn-cms.f-static.net/uploads/4459025/normal_600ef4388bfcf.pdf
    • http://svarka-aurora.online/1149827040613v3b.pdf
    • https://cdn-cms.f-static.net/uploads/4416789/normal_601457937b390.pdf
    • https://cdn.sqhk.co/titabofasika/jidhfic/83393239084.pdf
    • https://cdn-cms.f-static.net/uploads/4451348/normal_602748abec0f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lolijexejomak/can_you_name_your_baby_god.pdf
    • https://s3.amazonaws.com/vatosolikijike/7797880062.pdf
    • https://s3.amazonaws.com/vexosafugunu/aggiornamento_android_su_samsung_s3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ec.bin
09dd29c80f10618124f270ae75fe77e756aa0f771a02de6ebadae34b52ac945f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 5732 bytes
font_01_sfnt_off0000f84f.bin
d243c45d5241be20565eef03c7d37a49db2179f2d4376c083ee3f923e546d9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 9996 bytes

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