Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb8a0fb3f07952b…

MALICIOUS

PDF

63.7 KB Created: 2021-04-02 01:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e461f159f8a7b845e2dc60f7f232244e SHA-1: 44cb237828a6dca50f2206c303a43015d41dad5b SHA-256: 1bb8a0fb3f07952b0e228969a0538b6771bb2342ff6480eb992e3dedc125f0ce
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs, 'https://mezovuduw.ru/award?keyword=queen+bohemian+rhapsody+lyrics+pdf', suggests a phishing or scam attempt disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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
  • 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://mezovuduw.ru/award?keyword=queen+bohemian+rhapsody+lyrics+pdf PDF link annotation
    • http://punubukotulanes.22web.org/89312426145.pdfIn PDF document text
    • http://fesuzeroba.iblogger.org/agustina_bessa_luis.pdfIn PDF document text
    • http://ramisur.22web.org/lorunepawanetedulok.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/vapelurowar/voxozatagav.pdfIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_8e34ddbc49ef46418d169e9209cc58c2.pdf?index=trueIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_fa87df289da84b17a82255336dea3fb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/any_video_converter_app.pdfIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_8c9dbe64d1ed433ca670957757df74a3.pdf?index=trueIn PDF document text
    • http://jadefixadejin.rf.gd/70970890356.pdfIn PDF document text
    • http://pobuwejugu.epizy.com/south_african_gas_installation_guidelines.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_dcc8da2a9ef541fa85ef304bf5e66459.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/pioneer_sph-da120_android.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_43bbf40cb73d43d09ded4ac44e525cbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25429fe1-1a9d-496d-a9dc-0f8b1b282796/translate_spanish_to_english_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/xewuxenesi.pdfIn PDF document text
    • http://vitimalu.rf.gd/86451975881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/600d66ad-d782-4d8b-b59c-4760b2babc2f/john_g_lake_books_drive.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_271de171f762459ea853d6ac0f311276.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5700 bytes
SHA-256: d2c92bfaa0435135670bd994b83ffaa5c61697bb7c90e41b0a05c8875ff25f01