Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f7042a804d3636…

MALICIOUS

PDF

69.0 KB Created: 2021-02-01 01:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6a71bcbccce96236428d8d4825b9afaf SHA-1: d90dd4be2510a1cabb899946d373add673e13ff9 SHA-256: 92f7042a804d3636b16f6c849e7b18df1c95c048d912e6eb5d8398acb06b2c9e
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document impersonates a Google Drive 'access denied' error to trick users into clicking malicious links. The document contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://druttle.ru/aws?utm_term=google+drive++error+access+denied PDF link annotation
    • https://cdn.sqhk.co/gapalagabig/ajcZBN1/51482328174.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/hbvghgh/zilumigalikegu.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/rapikuxarigese.pdfIn PDF document text
    • http://nukicew.xyz/superhero_maker_marveldcnkr.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/hciejfl/mosilejamiju.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/jTxdlgj/30569553939.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/xp8FjfY/gigebexanikinugum.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/guwixojuzi-visinamopaxufej-gelozunol-wutagewotu.pdfIn PDF document text
    • https://cdn.sqhk.co/lalusozokigi/cLhgghi/pc_games_free_download_sites.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/k7hgiaB/slice_of_life_bakery_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/b71UjiG/paxamoragudatitapirewo.pdfIn PDF document text
    • https://miwolugakibu.weebly.com/uploads/1/3/1/3/131383652/7edb38ec5658611.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/tejafad-wipavipo.pdfIn PDF document text
    • http://it50life.pro/leadership_skills_in_nursing_journal_articlesy7ksv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20B 5200 bytes
SHA-256: 957d203b83cf92c83b086513481df8c73ead7568f85c59ffd778790f97a57bff
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10416 bytes
SHA-256: a4f6684b413fbf03ccb3bbc7e4327e20d2b798c5745a225642a8bccb5be5e599

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