Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dffa66d09806b0c…

MALICIOUS

PDF

82.0 KB Created: 2021-03-01 20:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 16a9d704b21906be0d23b9164f25c33c SHA-1: 4e70daf2e4ab0d284380ab04673551534398df89 SHA-256: 3dffa66d09806b0c6208c06dc36f5ba8d34adba7e4103a180e6a43f737e51413
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a common technical query, likely intended to trick users into clicking it. ClamAV detection and ML classification strongly indicate malicious intent, specifically a phishing or trojan payload delivery. No scripts were extracted, but the presence of an external URI points to a download or redirection attempt.

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://zajinet.ru/award?keyword=how+to+pair+turtle+beach+stealth+700+bluetooth PDF link annotation
    • http://xilegutopeza.22web.org/72571642266.pdfIn PDF document text
    • http://gadalonevuv.iblogger.org/lizukukukilumaxavirowirut.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/fake_love_piano_sheet_music_easyma3dc.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/debotofibusibe.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/sifusekujetudemiwelolig.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/will_doctors_do_home_visits.pdfIn PDF document text
    • http://svoydvalend.xyz/last_reported_case_of_zika_in_thailandyqz4i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/64255747021.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/bed_sheet_fabric_texture.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/59263455359.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/8481596489.pdfIn PDF document text
    • http://napezidemilolez.epizy.com/felix_dennis_how_to_get_rich_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/toshiba_synaptics_touchpad_driver_windows_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/50276869737.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/rubber_gasket_material_sheets.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/clarion_call_define.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/adobe_reader_new.pdfIn PDF document text
    • http://nadiripu.epizy.com/7844850942.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_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 5436 bytes
SHA-256: 183e349e125e956d8cc1def67951653b442bf91fcbd64f64dd14ab3a1c0c29e8
font_01_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 10628 bytes
SHA-256: dd4e80863b6ad266364186bcb9ba7b6e3e84b48cc09da380636a6fb60871c3e5

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