Malicious PDF — malware analysis report

Static analysis result for SHA-256 6086bb9896dec85c…

MALICIOUS

PDF

106.7 KB Created: 2021-03-28 02:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 98107888441101bd565842599d4c8b4a SHA-1: b63cbcc32d3374b96dff925a34c971a3d9091028 SHA-256: 6086bb9896dec85cd7e7669fae4430990bc154da550fde8bd1acc53bdf30891b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to link farms designed for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=difference+between+auxiliary+verb+and+modal+verb+pdf PDF link annotation
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/3499611.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/4558183.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/h8hmIih/17228164522.pdfIn PDF document text
    • https://fuvufuraw.weebly.com/uploads/1/3/4/7/134745886/nodoxefutozit-lipewomumuwiku-sobodegitebefor.pdfIn PDF document text
    • https://xoxopurotawasuj.weebly.com/uploads/1/3/4/6/134651309/viguj.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/SxiajgD/zig_zag_chevron_knitting_pattern.pdfIn PDF document text
    • https://cdn.sqhk.co/lemusezilaz/ohi3gdM/talerim.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/yVyjfwq/73081645422.pdfIn PDF document text
    • https://kuvixirizu.weebly.com/uploads/1/3/0/7/130739951/vesaviban.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_784860fddb3e47a7a92cbcb6a41c3919.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/pdf_editor_online_free_rotate_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/78843615335.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/que_es_el_bitcoin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84c3c76-23b6-4d61-8366-d3416206bddb/xivuwanodowekafokuxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b7fc2c-ff1b-44e9-9315-47c96b195e01/zopuvukuruminoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e068d00-98df-4200-950f-302ead7bfb62/18060759404.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_ecb2f8bbfbf84f37b6c1cea757fd1dbe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/32013506964.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/xanulebofunebikuxorul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a0b822-882a-4ac7-8eeb-dca5e622f9bc/kukupowexokevitafegikis.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/breathing_underwater.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_23241e9225c7476f8fa8cd560da6932f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/toniwanotutaxabumiz.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_b661a8176c5b4347b6decea714e86eec.pdf?index=trueIn 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_off0001627c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1627C 5584 bytes
SHA-256: 5060450060a8a12738b63306362da49024e9fa8b06dd5ddaac993a618d03cfaf
font_01_sfnt_off0001758d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1758D 11368 bytes
SHA-256: c56d7013638fa5640e2faede0683b7766e6654d64bbe18d6275fc77065796452

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