Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b55d30ecba9a247…

MALICIOUS

PDF

91.9 KB Created: 2021-02-26 23:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8a54f81a804e40fc34abb7e16afdcb24 SHA-1: c5210982a95d4e2f890ffb2fb9c1646d431d67ed SHA-256: 8b55d30ecba9a247958a745becdd01e4500cd49d662085f948ff4313ae7afedb
96 Risk Score

Malware Insights

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

The PDF document contains an external URI pointing to a URL that mimics a search result for router setup software, likely a lure to download a malicious payload. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nipisod.ru/award?keyword=cisco+e1200+router+setup+software PDF link annotation
    • https://cdn.sqhk.co/mosugukasiba/Y3ngeS5/jakasolitigifipomobol.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/E4Uhbhg/3608317175.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/e5gcYpU/godizexozemofipawukaxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/cjbgfLz/photo_editor_pro_app_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/idEaehf/steamer_basket_alternative.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_6034d97d9e28f.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/XWjhkTc/22063293221.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/bOjesia/tafesejabufejerix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371267/normal_5feb768ecdc88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fd2f5666fab5.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/XvvBgeH/bristol_airport_flight_departures.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/gcgggdx/zimufuwazijufobolorimema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412763/normal_5fe3da2b3b9ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414353/normal_601ae543efdba.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/hfmcBdQ/bollywood_mashup_songs_free_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/jfVFjju/51118112947.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/CvZ32ge/gofojozedororu.pdfIn PDF document text
    • https://cdn.sqhk.co/nisikevepoxi/ahaM0hf/find_friends_iphone_ios_14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 5300 bytes
SHA-256: ade440c1fdb570d25ae246eea2604dd581edb98bb45734b54aaa96053d6869de
font_01_sfnt_off00013d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D57 10748 bytes
SHA-256: 1117d59cfdef217551b43eeb1a72802e1e39b9c10a1addaef70eb47477a9cead

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