Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b71a6f028048df…

MALICIOUS

PDF

78.7 KB Created: 2021-03-30 07:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0e5928efccdb9a62dbb0c7422885452f SHA-1: f125e0b7c5c641021c3f474c57a97a4ee88c7b63 SHA-256: f8b71a6f028048df99ade0b8639447a939cf7776d27d6eaf9d4179e77df72352
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'golden gate cloning crispr', likely to trick users into clicking the embedded malicious URLs.

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://lozipotod.ru/wix?keyword=golden+gate+cloning+crispr PDF link annotation
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/nugewu.pdfIn PDF document text
    • https://jizeloxeresuvur.weebly.com/uploads/1/3/4/7/134763051/bupegexaz.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/94988916738.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hjgfibx/gmail_sign_in_android_phone.pdfIn PDF document text
    • https://nugaruxiboxora.weebly.com/uploads/1/3/0/7/130738781/letarizowujav.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/jenusis.pdfIn PDF document text
    • https://ronewomiz.weebly.com/uploads/1/3/0/8/130874064/kinowumutudegof_runirunobu.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/Ehdiazu/bedoyecta_b12_para_que_sirve.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/aig4eib/download_range_master_sniper_academy_mod_apk.pdfIn PDF document text
    • https://ganunuzarije.weebly.com/uploads/1/3/4/5/134518475/rujizunafabulig-pojutupigelokir-lekukuk-mejawavipodu.pdfIn PDF document text
    • http://kalowodopole.mygamesonline.org/39505677584.pdfIn PDF document text
    • https://lexobuto.weebly.com/uploads/1/3/2/7/132740623/b4fce.pdfIn PDF document text
    • https://kevelowomovozi.weebly.com/uploads/1/3/4/0/134012304/pirebumiseribof_benexotimitiju.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/fulesomawuwujonatakikotaw.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/nuxulikiwab/65900778747.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/acids_bases_and_salts_worksheet_answers_crossword.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/going_to_worksheets.pdfIn PDF document text
    • http://niselasot.atwebpages.com/xuniluvajuv.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/nice_systematic_literature_review_guidelines.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_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 5272 bytes
SHA-256: 5726c967956a60ddfa4b3027771cd667b210af549216ffeeeab17602dbddb1fa
font_01_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 11164 bytes
SHA-256: f41b349e35bf75ffcce45c3e34f6b42f66363891b2656a3f632f9526cdc228e0

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