Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9b0ee61c78b68d…

MALICIOUS

PDF

86.9 KB Created: 2021-02-21 18:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1faef7c89be39124fc91903a4b096f92 SHA-1: 41210c379370f7df6629433a7b3c473325da8731 SHA-256: 6c9b0ee61c78b68d3dbc33b9df902fdabc1f64e06e02e48cff3f087dd88c230e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be part of a phishing lure, disguised as a search result. The PDF structure itself also shows signs of manipulation, with duplicate object bodies, suggesting an attempt to evade detection or obfuscate its true nature.

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://jacksth.ru/strik?utm_term=how+do+you+find+number+of+atoms+in+a+compound PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463306/normal_5fe3844d8af0b.pdfIn PDF document text
    • http://meetsoda.pro/sibavajobizofufutusulaj3u47f.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/86621118204y0xli.pdfIn PDF document text
    • http://triple-doska5.club/list_of_worksheet_names_in_excel_vbap1k0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_6032010ec7d3f.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/EVbicig/stitcher_podcast_player.pdfIn PDF document text
    • https://cdn.sqhk.co/wireriduwude/YSfjkoN/80138394996.pdfIn PDF document text
    • http://mazers.fun/hoja_de_rifa_100_numeros_para_imprimek63c.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/gBgdsd6/29986925050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390661/normal_5febeacfd4752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_6007aa3d5b4ee.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/ditulegf59ns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5ffa99025ae65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fe1a4769e871.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/pulavokaxe/australian_tax_invoice_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/71063414294.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/xesopuwaniduv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000cd90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD90 22584 bytes
SHA-256: 9c0be863b483742e0b8fff908275cf5a60e81c6102eada640c852348688a751a
font_01_sfnt_off0001145c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145C 5564 bytes
SHA-256: fd630fc1d64dd5b6c74a3e8e2a25f311f7e781ae870904f8d3206d0b0f78bad7
font_02_sfnt_off00012744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12744 10848 bytes
SHA-256: f51297b216656bdf4efcdf313d18c9d50278fa63c45f9c3dffa0dc9890ee3442

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