Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e59d396d20c9d2a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-22 18:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 05226079d355a6f4fbbffb5a32f60f34 SHA-1: 8f4bce0d62cbdb0bc270557a903a0c815f795023 SHA-256: 8e59d396d20c9d2af09bcb1da45dc308b012663416b4200331a80685b968749c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+many+chapters+harry+potter+2 PDF link annotation
    • https://jesofoxera.weebly.com/uploads/1/3/1/4/131407857/8943761.pdfIn PDF document text
    • http://namekegosanobus.22web.org/fupebakamulilorenewaga.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/jQjbFPN/mermaids_cher_soundtrack.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/223878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452373/normal_5fcdc3216fe7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459645/normal_5fdff83b84430.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/ghhaTjj/find_my_phone_by_android.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/kubexavugatap-majuzitejizim-zarope.pdfIn PDF document text
    • https://popezerimev.weebly.com/uploads/1/3/4/5/134514232/5845947.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ryijifl/makolipunapamabukapaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5ff9d8e3d39fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484376/normal_6041c9dd5c63a.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/petubapizo/47707425963.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/free_address_book_template_word.pdfIn PDF document text
    • http://vininotubosom.epizy.com/new_telugu_album_songs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/microsoft_project_pro_2019_crack.pdfIn PDF document text
    • http://zekinipumulo.epizy.com/assembly_rowdy_cinema_patalu.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/double_bed_sheet_measurements.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/lamip.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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5428 bytes
SHA-256: 31eaa0521d2bf6efc6f737ca86f09158081e9ae67ad19a3ff61ca40471f3ca12
font_01_sfnt_off0000fc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC09 11500 bytes
SHA-256: 4c7c374d8684f3197db24b793387a9266d60cc60287ef378bde9e94cc796ee80

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