Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1cf880cb8007c0…

MALICIOUS

PDF

75.2 KB Created: 2021-03-20 20:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a0f55e21728d342a6748e43907ddd05c SHA-1: a51cbc68709c774b0fb215541c766f46a2fdf142 SHA-256: dd1cf880cb8007c0057cba2bc53e6b49bc90a70d3fc255d5e8276d3b1c563979
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, possibly to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bologen.ru/award?keyword=english+grammar+pdf+in+gujarati+language PDF link annotation
    • https://cdn.sqhk.co/jimavidozeze/1Nidx2Y/66488205087.pdfIn PDF document text
    • https://famepakemujo.weebly.com/uploads/1/3/2/7/132740594/719e79889f.pdfIn PDF document text
    • https://denalozi.weebly.com/uploads/1/3/0/7/130776502/xemegego_simewuj_lisipejitizete_wonivuzetemap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425933/normal_5fdd087897513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494147/normal_60561edfdcfcf.pdfIn PDF document text
    • https://xaluromaw.weebly.com/uploads/1/3/4/8/134862284/7847633.pdfIn PDF document text
    • https://kerobasoxegetun.weebly.com/uploads/1/3/4/0/134017970/1528849.pdfIn PDF document text
    • https://cdn.sqhk.co/lomuwomigez/hiLsgh2/xugilamupififufibu.pdfIn PDF document text
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/koxarotani_migutibakoj_lanujubagubu_rapotez.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/zupalodipuketavejir.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/3643028.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/tunenijexe/cartoon_characters_printable_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/hooke_s_law_simulation_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/52371133505.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/buscar_iphone_perdido_desde_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/kapebifuder.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/activation_windows_7_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/13905653175.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_off0000e5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DC 5488 bytes
SHA-256: 6dad7489dbc2ad1d501344fa3ad3fc5a8485493c7d4f71e81005cfe38b3dbdf7
font_01_sfnt_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 11656 bytes
SHA-256: df60a2aeacaa650a03fa0cdb261f9764255230fe92d65ab7cd59023715f3f5d1

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