Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fd20db63d14d68…

MALICIOUS

PDF

79.0 KB Created: 2021-05-23 07:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: def75c0f81bd0150cce4804f120cccb8 SHA-1: 14de9c11769a22d88f2e39ff67e08b2fc952abbc SHA-256: 22fd20db63d14d68c3976a0d14a4e1a05df1628d16822b9973faf950b24dc48f
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=saga+harry+potter+libros+amazon PDF link annotation
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/fesarekulusop-tipolexofawojap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5fcc0026b5abb.pdfIn PDF document text
    • https://pojewesam.weebly.com/uploads/1/3/1/4/131410485/4192884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_60535f1e3201e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5ffde29e04aef.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/sovizedexomojagivami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384461/normal_6005f3676b551.pdfIn PDF document text
    • https://rusuligoxajikug.weebly.com/uploads/1/3/4/3/134399392/walipoxebe-kagomesima-xofojev-farupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_60291da0091e6.pdfIn PDF document text
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/3984455.pdfIn PDF document text
    • https://baxajufukawe.weebly.com/uploads/1/3/4/3/134338502/mipanatogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444110/normal_5fee2fa03fa4d.pdfIn PDF document text
    • https://pesenulowujef.weebly.com/uploads/1/3/5/3/135325158/5657109.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/kizodes.pdfIn PDF document text
    • https://rimekadosa.weebly.com/uploads/1/3/4/4/134467829/jofelopobowi.pdfIn PDF document text
    • https://sovufejado.weebly.com/uploads/1/3/0/7/130740048/32f4ff26af21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_600c3cbe20a49.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/rojalexipokadaz/lovabalaranebabowos.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/walev.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/zetira.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/bleacher_report_top_50_list_nba.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/laramidavekivewobib.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/doxemora.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/chyawanprash_song_free_mr_jatt.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_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 5628 bytes
SHA-256: 03b2bd3bc3dd25c1a0c99d88398bd0b988fea9f4534e23df96eb6456c71352b5
font_01_sfnt_off0001087c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 11232 bytes
SHA-256: 405ec12ceea7a4879e524b5285cff30b50daad9fa7d9c18777cf6c282b4ad322

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